Ohio (/oʊˈhaɪ.oʊ/ ⓘ oh-HY-oh) is a state in the Midwestern region of the United States. It borders Lake Erie to the north, Pennsylvania to the east, West Virginia to the southeast, Kentucky to the southwest, Indiana to the west, and Michigan to the northwest. Of the 50 U.S. states, it is the 34th-largest by area. With a population of nearly 11.8 million, Ohio is the seventh-most populous and tenth-most densely populated state. Its capital and most populous city is Columbus, with other large population centers including Cleveland, Cincinnati, Dayton, Akron, and Toledo. Ohio is nicknamed the "Buckeye State" after its Ohio buckeye trees, and Ohioans are also known as "Buckeyes".

Ohio derives its name from the Ohio River that forms its southern border, which, in turn, originated from the Seneca word ohiːyo', meaning "good river", "great river", or "large creek". The state was home to several ancient indigenous civilizations, with humans present as early as 10,000 BCE. It arose from the lands west of the Appalachian Mountains that were contested by various native tribes and European colonists from the 17th century through the Northwest Indian Wars of the late 18th century. Ohio was partitioned from the Northwest Territory, the first frontier of the new United States, becoming the 17th state admitted to the Union on March 1, 1803, and the first under the Northwest Ordinance. It was the first post-colonial free state admitted to the union and became one of the earliest and most influential industrial powerhouses during the 20th century.

Although it has transitioned to a more information- and service-based economy in the 21st century, it remains an industrial state, ranking seventh in GDP as of 2019[update], with the third-largest manufacturing sector and second-largest automobile production. Modeled on its federal counterpart, Ohio's government is composed of the executive branch, led by the governor; the legislative branch, consisting of the bicameral Ohio General Assembly; and the judicial branch, led by the state Supreme Court. Ohio occupies 15 seats in the United States House of Representatives, the seventh-largest delegation. Seven presidents of the United States have come from Ohio, earning it the moniker "the Mother of Presidents".

Archeological evidence of spear points of both the Folsom and Clovis types indicate that the Ohio Valley was inhabited by nomadic people as early as 13,000 BC. These early nomads disappeared from Ohio by 1,000 BC. Between 1,000 and 800 BC, the sedentary Adena culture emerged. The Adena established "semi-permanent" villages because they domesticated plants, including sunflowers, and "grew squash and possibly corn"; with hunting and gathering, this cultivation supported more settled, complex villages. The most notable remnant of the Adena culture is the Great Serpent Mound, located in Adams County, Ohio.

Around 100 BC, the Adena evolved into the Hopewell people, who were also mound builders. Their complex, large and technologically sophisticated earthworks can be found in modern-day Marietta, Newark, and Circleville. They were also a prolific trading society, their trading network spanning a third of the continent. The Hopewell disappeared from the Ohio Valley about 600 AD. The Mississippian culture rose as the Hopewell culture declined. Many Siouan-speaking peoples from the plains and east coast claim them as ancestors and say they lived throughout the Ohio region until approximately the 13th century.

There were three other cultures contemporaneous with the Mississippians: the Fort Ancient people, the Whittlesey Culture and the Monongahela Culture. All three disappeared in the 17th century. Their origins are unknown. The Shawnees may have absorbed the Fort Ancient people. It is also possible that the Monongahela held no land in Ohio during the Colonial Era. The Mississippian culture was close to and traded extensively with the Fort Ancient people.

Indians in the Ohio Valley were greatly affected by the aggressive tactics of the Iroquois Confederation, based in central and western New York. After the Beaver Wars in the mid-17th century, the Iroquois claimed much of the Ohio country as hunting and, more importantly, beaver-trapping ground. After the devastation of epidemics and war in the mid-17th century, which largely emptied the Ohio country of Indigenous people[dubious – discuss] by the mid-to-late 17th century, the land gradually became repopulated by the mostly Algonquian. Many of these Ohio-country nations were multiethnic (sometimes multi-linguistic) societies born out of the earlier devastation brought about by disease,[clarification needed] war, and subsequent social instability. They subsisted on agriculture (corn, sunflowers, beans, etc.) supplemented by seasonal hunts. By the 18th century, they were part of a larger global economy brought about by European entry into the fur trade.

Some of the Indigenous nations that historically inhabited Ohio include the Iroquoian,[c] the Algonquian,[d] and the Siouan.[e] Ohio country was also the site of Indian massacres, such as the Yellow Creek massacre and the Gnadenhutten massacre. After the War of 1812, when Natives suffered serious losses such as at Tippecanoe, most Native tribes either left Ohio or had to live on only limited reservations. By 1842, all remaining Natives were forced out of the state.

During the 18th century, the French set up a system of trading posts to control the fur trade in the region. Beginning in 1754, the Kingdom of France and Kingdom of Great Britain fought in the French and Indian War, with various Native American tribes on each side. As a result of the Treaty of Paris, the French ceded control of Ohio and the remainder of the Old Northwest to Great Britain in 1763.

Before the American Revolution, Britain thinly exercised sovereignty over Ohio Country by lackadaisical garrisoning of the French forts.[f] Just beyond Ohio Country was the great Miami capital of Kekionga, which became the center of British trade and influence in Ohio Country and throughout the future Northwest Territory. By the Royal Proclamation of 1763, British lands west of Appalachia were forbidden to settlement by colonists. The Treaty of Fort Stanwix in 1768 explicitly reserved lands north and west of the Ohio as Native lands. British military occupation in the region contributed to the outbreak of Pontiac's War in 1763. Ohio tribes participated in the war until an armed expedition in Ohio led by Brigadier General Henry Bouquet brought about a truce. Another colonial military expedition into the Ohio Country in 1774 brought Lord Dunmore's War, kicked off by the Yellow Creek massacre in Ohio, to a conclusion. In 1774, Britain passed the Quebec Act, which formally annexed Ohio and other western lands to the Province of Quebec in order to provide a civil government and to centralize British administration of the Montreal-based fur trade. The prohibition of settlement west of the Appalachians remained, contributing to the American Revolution.

By the start of the American Revolutionary War, the movement of Natives and Americans between the Ohio Country and Thirteen Colonies had resulted in tension. Fort Pitt in Pennsylvania had become the main fort where expeditions into Ohio started. Intrusions into the area included General Edward Hand's 1778 movement of 500 Pennsylvania militiamen from Fort Pitt towards Mingo towns on the Cuyahoga River, where the British stored military supplies which they distributed to Indian raiding parties; Colonel Daniel Brodhead's invasion in 1780 and destruction of the Lenape Indian capital of Coshocton; a detachment of one hundred of George Rogers Clark's troops that were ambushed near the Ohio River by Indians led by Joseph Brant in the same year; a British and Native American attack on the U.S.' Fort Laurens; and the 1782 detainment and murder of 96 Moravian Lenape pacifists by Pennsylvania militiamen in the Gnadenhutten massacre.

The western theatre never had a decisive victor. In the Treaty of Paris in 1783, Britain ceded all claims to Ohio Country to the new United States after its victory in the American Revolutionary War.

The United States created the Northwest Territory under the Northwest Ordinance of 1787. Slavery was not permitted in the new territory. Settlement began with the founding of Marietta by the Ohio Company of Associates, which had been formed by a group of American Revolutionary War veterans. Following the Ohio Company, the Miami Company (also referred to as the "Symmes Purchase") claimed the southwestern section, and the Connecticut Land Company surveyed and settled the Connecticut Western Reserve in present-day Northeast Ohio. Territorial surveyors from Fort Steuben began surveying an area of eastern Ohio called the Seven Ranges at about the same time.

The old Northwest Territory originally included areas previously known as Ohio Country and Illinois Country. As Ohio prepared for statehood, the Indiana Territory was created, reducing the Northwest Territory to approximately the size of present-day Ohio plus the eastern half of the Lower Peninsula of Michigan and the eastern tip of the Upper Peninsula and a sliver of southeastern Indiana called "The Gore".

The coalition of Native American tribes, known as the Western Confederacy, was forced to cede extensive territory, including much of present-day Ohio, in the Treaty of Greenville in 1795.

Under the Northwest Ordinance, areas could be defined and admitted as states once their population reached 60,000. Although Ohio's population was only 45,000 in December 1801, Congress determined that it was growing rapidly enough and accelerated the process via the Enabling Act of 1802. In regard to the Leni Lenape natives, Congress decided that 10,000 acres on the Muskingum River in the present state of Ohio would "be set apart and the property thereof be vested in the Moravian Brethren ... or a society of the said Brethren for civilizing the Indians and promoting Christianity".

Rufus Putnam served in important military capacities in both the French and Indian War and the American Revolutionary War. He was one of the most highly respected men in the early years of the United States.

In 1776, Putnam created a method of building portable fortifications, which enabled the Continental Army to drive the British from Boston. George Washington was so impressed that he made Putnam his chief engineer. After the war, Putnam and Manasseh Cutler were instrumental in creating the Northwest Ordinance, which opened up the Northwest Territory for settlement. This land was used to serve as compensation for what was owed to Revolutionary War veterans. Putnam organized and led the Ohio Company of Associates, who settled at Marietta, Ohio, where they built a large fort, Campus Martius. He set substantial amounts of land aside for schools. In 1798, he created the plan for the construction of the Muskingum Academy (now Marietta College). In 1780, the directors of the Ohio Company appointed him superintendent of all its affairs relating to the settlement north of the Ohio River. In 1796, President George Washington commissioned him as Surveyor-General of United States Lands. In 1788, he served as a judge in the Northwest Territory's first court. In 1802, he served in the convention to form a constitution for the State of Ohio.

On February 19, 1803, U.S. President Thomas Jefferson signed an act of Congress that approved Ohio's boundaries and constitution. But Congress had not passed a formal resolution admitting Ohio as the 17th state. Although no formal resolution of admission was required, when the oversight was discovered in 1953, as Ohio began preparations for celebrating its sesquicentennial, Ohio congressman George H. Bender introduced a bill in Congress to admit Ohio to the Union retroactive to March 1, 1803, the date on which the Ohio General Assembly first convened. At a special session at the old state capital in Chillicothe, the Ohio state legislature approved a new petition for statehood, which was delivered to Washington, D.C., on horseback, and approved that August.

Ohio has had three capital cities: Chillicothe, Zanesville, and Columbus. Chillicothe was the capital from 1803 to 1810. The capital was then moved to Zanesville for two years as part of a state legislative compromise to get a bill passed. The capital was then moved back to Chillicothe from 1812 to 1816. Finally, the capital was moved to Columbus, to be near the state's geographic center.

Although many Native Americans migrated west to evade American encroachment, others remained in the state, sometimes assimilating in part. Starting around 1809, the Shawnee pressed resistance to encroachment again. Under Chief Tecumseh, Tecumseh's War officially began in Ohio in 1811. When the War of 1812 began, the British decided to attack from Upper Canada into Ohio and merge their forces with the Shawnee. This continued until Tecumseh was killed at the Battle of the Thames in 1813. Most of the Shawnee, excluding the Pekowi in Southwest Ohio, were forcibly relocated west. Ohio played a key role in the War of 1812, as it was on the front line in the Western theater and the scene of several notable battles both on land and in Lake Erie. On September 10, 1813, the Battle of Lake Erie, one of the major battles, took place near Put-in-Bay, Ohio. The British eventually surrendered to Oliver Hazard Perry.

Ultimately, after the U.S. government used the Indian Removal Act of 1830 to force countless Native American tribes on the Trail of Tears, where all the southern states except for Florida were successfully emptied of Native peoples, the government panicked because most tribes did not want to be forced out of their own lands. Fearing further wars between Native tribes and American settlers, they pushed all remaining Native tribes in the East to migrate west against their will, including all remaining tribes in Ohio.

In 1835, Ohio fought with the Michigan Territory in the Toledo War, a mostly bloodless boundary war over the Toledo Strip. Only one person was injured in the conflict. Congress intervened, making Michigan's admittance as a state conditional on ending the conflict. In exchange for giving up its claim to the Toledo Strip, Michigan was given the western two-thirds of the Upper Peninsula, in addition to the eastern third, which was already considered part of the territory.

Ohio's central position and its population gave it an important place in the Civil War. The Ohio River was a vital artery for troop and supply movements, as were Ohio's railroads. Ohio's industry made it one of the most important states in the Union during the war. It contributed more soldiers per capita than any other state in the Union. In 1862, the state's morale was badly shaken in the aftermath of the Battle of Shiloh, a costly victory in which Ohio forces suffered 2,000 casualties. Later that year, when Confederate troops under the leadership of Stonewall Jackson threatened Washington, D.C., Ohio governor David Tod recruited 5,000 volunteers to provide three months of service. From July 13 to 26, 1863, towns along the Ohio River were attacked and ransacked in Morgan's Raid, starting in Harrison in the west and culminating in the Battle of Salineville near West Point in the far east. While this raid was overall insignificant to the Confederacy, it aroused fear among people in Ohio and Indiana as it was the furthest advancement of troops from the South in the war. Almost 35,000 Ohioans died in the conflict, and 30,000 were physically wounded. By the end of the Civil War, the Union's top three generals—Ulysses S. Grant, William Tecumseh Sherman, and Philip Sheridan—were all from Ohio.

During much of the 19th century, industry was rapidly introduced to complement an existing agricultural economy. One of the first iron manufacturing plants, Hopewell Furnace, opened near Youngstown in 1804. By the mid-19th century, 48 blast furnaces were operating in Ohio, most in the southern part of the state. Discovery of coal deposits aided the further development of Ohio's steel industry, and by 1853 Cleveland was the nation's third-largest iron and steel producer. The first Bessemer converter was purchased by the Cleveland Rolling Mill Company, which became part of the U.S. Steel Corporation after the merger of Federal Steel Company and Carnegie Steel, the first billion-dollar American corporation. The first open-hearth furnace used for steel production was constructed by the Otis Steel Company in Cleveland, and by 1892, Ohio was the second-largest steel-producing state, behind Pennsylvania. Republic Steel was founded in Youngstown in 1899 and was at one point the nation's third-largest producer. Armco, now AK Steel, was founded in Middletown in 1899.

The state legislature officially adopted the flag of Ohio on May 9, 1902. Dayton natives Orville and Wilbur Wright made four brief flights at Kitty Hawk, North Carolina, on December 17, 1903, inventing the first successful airplane. Ohio was hit by its greatest natural disaster in the Great Flood of 1913, resulting in at least 428 fatalities and hundreds of millions of dollars in property damage, particularly around the Great Miami River basin.

The National Football League was originally founded in Canton, Ohio in 1920 as the American Professional Football Conference. It included Ohio League teams in five Ohio cities (Akron, Canton, Cleveland, Columbus, and Dayton), none of which still exist. The first official game occurred on October 3, 1920, when the Dayton Triangles beat the Columbus Panhandles 14–0 in Dayton. Canton was enshrined as the home of the Pro Football Hall of Fame in 1963.

During the 1930s, the Great Depression struck the state hard. By 1933, more than 40% of factory workers and 67% of construction workers were unemployed in Ohio. Approximately 50% of industrial workers in Cleveland and 80% in Toledo became unemployed, with the state unemployment rate reaching a high of 37.3%. American Jews watched the rise of Nazi Germany with apprehension. Cleveland residents Jerry Siegel and Joe Shuster created the Superman comic character in the spirit of the Jewish golem. Many of their comics portrayed Superman fighting and defeating the Nazis. Approximately 839,000 Ohioans served in the U.S. armed forces during World War II, of whom over 23,000 died or were missing in action.

Artists, writers, musicians and actors developed in the state throughout the 20th century and often moved to other cities that were larger centers for their work. They included Zane Grey, Milton Caniff, George Bellows, Art Tatum, Roy Lichtenstein, and Roy Rogers. Alan Freed, who emerged from the swing dance culture in Cleveland, hosted the first live rock 'n roll concert in Cleveland in 1952. Famous filmmakers include Steven Spielberg, Chris Columbus and the original Warner Brothers, who set up their first movie theatre in Youngstown before the company relocated to California. The state produced many popular musicians, including Dean Martin, Doris Day, The O'Jays, Marilyn Manson, Dave Grohl, Devo, Macy Gray and The Isley Brothers.

Two Ohio astronauts completed significant milestones in the space race in the 1960s: John Glenn becoming the first American to orbit the Earth, and Neil Armstrong becoming the first human to walk on the Moon. In 1967, Carl Stokes was elected mayor of Cleveland and became the first African American mayor of one of the nation's 10 most populous cities.

In 1970, an Ohio Army National Guard unit fired at students during an antiwar protest at Kent State University, killing four and wounding nine. The Guard had been called onto campus after several protests in and around campus became violent, including a riot in downtown Kent and the burning of an ROTC building. The main cause of the protests was the United States' invasion of Cambodia during the Vietnam War.

Ohio was an important state in the developing ties between the United States and the People's Republic of China in the late 1970s and early 1980s.: 59  Relations between the two countries normalized in 1979, during the second term of Ohio governor Jim Rhodes.: 112  Rhodes sought to encourage economic ties, viewing China as a potential market for Ohio machinery exports.: 112  In July 1979, Rhodes led a State of Ohio Trade Mission to China.: 112  The trip resulted in developing economic ties, a sister state-province relationship with Hubei province, long-running Chinese exhibitions at the Ohio State Fair, and major academic exchanges between Ohio State University and Wuhan University.: 113  Beginning in the 1980s, the state entered into international economic and resource cooperation treaties and organizations with other Midwestern states, as well as New York, Pennsylvania, Ontario, and Quebec, including the Great Lakes Charter, Great Lakes Compact, and the Council of Great Lakes Governors.

Ohio's economy has undergone significant change in the 21st century, as the trend of deindustrialization has greatly impacted the American Midwest and the Rust Belt. Manufacturing in the Midwest experienced a stark decline during the early 21st century, a trend that greatly impacted Ohio. From 1990 to 2019, it lost over 300,000 manufacturing jobs, but added over 1,000,000 non-manufacturing jobs. Coinciding with this decline, Ohio has seen a large decline in union membership: 17.4% of Ohioan workers were union members in 2000, while 12.8% were union members in 2022.

In the wake of these economic changes, Ohio's state government has looked to promoting new industries to offset manufacturing losses, such as the production of solar energy and electric vehicles. One major program the state government launched was the "Third Frontier" program, created during the governorship of Bob Taft, which aimed to increase investment in Ohio and boost its technology sector. As of 2010, the Ohio Department of Development attributes the creation of 9,500 jobs to this program, with an average salary of $65,000, while having a $6.6 billion economic impact with a return on investment of 9:1. In 2010 the state won the International Economic Development Council's Excellence in Economic Development Award, celebrated as a national model of success.[citation needed]

Ohio's economy was also heavily afflicted by the Great Recession, as the state's unemployment rate rose from 5.6% in the first two months of 2008 up to a peak of 11.1% in December 2009 and January 2010. It took until August 2014 for the unemployment rate to return to 5.6%. From December 2007 to September 2010, Ohio lost 376,500 jobs. In 2009, Ohio had 89,053 foreclosures filings, a then-record for the state. The median household income dropped 7% from 2006–07 to 2008–09, and the poverty rate ballooned to 13.5% by 2009. By 2015, Ohio gross domestic product was $608.1 billion, the seventh-largest economy among the 50 states. In 2015, Ohio's total GDP accounted for 3.4% of U.S. GDP and 0.8% of world GDP.

Politically, Ohio has been long regarded as a swing state, but the success of many Republican candidates in Ohio since the late 2000s has led many to question whether Ohio remains an electoral battleground.

On March 9, 2020, the COVID-19 pandemic reached Ohio, with three cases reported. As of February 2023, over 41,600 Ohioans have died from COVID-19. Ohio's economy was also heavily impacted by the pandemic, as the state saw large job losses in 2020, as well as large amounts of subsequent stimulus spending.

Ohio's location has proven to be an asset for economic growth and expansion. Because it links the Northeast to the Midwest, much cargo and business traffic passes through its borders along its well-developed highways. Ohio has the nation's 10th-largest highway network and is within a one-day drive of 50% of North America's population and 70% of North America's manufacturing capacity. To the north, Ohio has 312 miles (502 km) of coastline with Lake Erie, which allows for numerous cargo ports such as Cleveland and Toledo. Ohio's southern border is defined by the Ohio River. Ohio's neighbors are Pennsylvania to the east, Michigan to the northwest, Lake Erie to the north, Indiana to the west, Kentucky on the south, and West Virginia on the southeast. Ohio's borders were defined by metes and bounds in the Enabling Act of 1802 as follows:

Bounded on the east by the Pennsylvania line, on the south by the Ohio River, to the mouth of the Great Miami River, on the west by the line drawn due north from the mouth of the Great Miami aforesaid, and on the north by an east and west line drawn through the southerly extreme of Lake Michigan, running east after intersecting the due north line aforesaid, from the mouth of the Great Miami until it shall intersect Lake Erie or the territorial line, and thence with the same through Lake Erie to the Pennsylvania line aforesaid.

Ohio is bounded by the Ohio River, but nearly all of the river belongs to Kentucky and West Virginia. In 1980, the U.S. Supreme Court held that, based on the wording of the cessation of territory by Virginia (which at the time included what is now Kentucky and West Virginia), the boundary between Ohio and Kentucky (and, by implication, West Virginia) is the northern low-water mark of the river as it existed in 1792.[100] Ohio has only that portion of the river between the river's 1792 low-water mark and the present high-water mark. The border with Michigan has also changed, as a result of the Toledo War, to angle slightly northeast to the north shore of the mouth of the Maumee River.

Much of Ohio features glaciated till plains, with an exceptionally flat area in the northwest being known as the Great Black Swamp. This glaciated region in the northwest and central state is bordered to the east and southeast first by a belt known as the glaciated Allegheny Plateau, and then by another belt known as the unglaciated Allegheny Plateau. Most of Ohio is of low relief, but the unglaciated Allegheny Plateau features rugged hills and forests.

Ohio's rugged southeastern quadrant, stretching in an outward bow-like arc along the Ohio River from the West Virginia Panhandle to the outskirts of Cincinnati, forms a distinct socioeconomic unit. Geologically similar to parts of West Virginia and southwestern Pennsylvania, this area's coal mining legacy, dependence on small pockets of old manufacturing establishments, and distinctive regional dialect set this section off from the rest of the state. In 1965, Congress passed the Appalachian Regional Development Act, an attempt to "address the persistent poverty and growing economic despair of the Appalachian Region".[101] It defines 29 Ohio counties as part of Appalachia.[102] While 1/3 of Ohio's land mass is part of the federally defined Appalachian region, only 12.8% of Ohioans live there (1.476 million people.)[103]

Significant Ohio rivers include the Cuyahoga River, Great Miami River, Maumee River, Muskingum River, and Scioto River. The rivers in northern Ohio drain into the northern Atlantic Ocean via Lake Erie and the St. Lawrence River, and those in southern Ohio drain into the Gulf of Mexico via the Ohio River and the Mississippi. Ohio also includes Bass Islands and Kelleys Island.[104] Grand Lake St. Marys in the west-central part of the state was constructed as a supply of water for canals in the canal-building era of 1820–1850. This body of water, over 20 square miles (52 km2), was the largest artificial lake in the world when completed in 1845.[105] Ohio's canal-building projects were not the economic fiasco that similar efforts were in other states. Some cities, such as Dayton, owe their industrial emergence to their location on canals, and as late as 1910 interior canals carried much of the bulk freight of the state.

Areas under the protection of the National Park Service include Cuyahoga Valley National Park, Hopewell Culture National Historical Park, Dayton Aviation Heritage National Historical Park, First Ladies National Historic Site, James A. Garfield National Historic Site, William Howard Taft National Historic Site, and the Charles Young Buffalo Soldiers National Monument and Perry's Victory and International Peace Memorial.[106]

Ohio has wide variety of unique animal species. Rare and endangered species include the Eastern Hellbender, which is found in the Southeastern Appalachian region of Ohio and is classified as state endangered.[107] The Eastern Hellbender is the 3rd largest amphibian in the world, and can grow up to 27 inches in length. It is fully aquatic and breathes almost entirely through its skin. Due to this, it is only found in pristine, cool, clear, fast flowing streams and rivers. It is highly threatened by habitat loss, water pollution, and sedimentation due to logging and other human activities.[108]

The climate of Ohio is a humid continental climate (Köppen climate classification Dfa/Dfb) throughout most of the state, except in the extreme southern counties of Ohio's Bluegrass region section, which are located on the northern periphery of the humid subtropical climate (Cfa) and Upland South region of the United States. Summers are typically hot and humid throughout the state, while winters generally range from cool to cold. Precipitation in Ohio is moderate year-round. Severe weather is not uncommon in the state, although there are typically fewer tornado reports in Ohio than in states located in what is known as the Tornado Alley. Severe lake effect snowstorms are also not uncommon on the southeast shore of Lake Erie, which is located in an area designated as the Snowbelt.

Although predominantly not in a subtropical climate, some warmer-climate flora and fauna do reach well into Ohio. For instance, some trees with more southern ranges, such as the blackjack oak, Quercus marilandica, are found at their northernmost in Ohio just north of the Ohio River. Also evidencing this climatic transition from a subtropical to a continental climate, several plants such as the Southern magnolia (Magnolia grandiflora), Albizia julibrissin (mimosa), Crape Myrtle, and even the occasional Needle Palm are hardy landscape materials regularly used as street, yard, and garden plantings in the Bluegrass region of Ohio; but these same plants will simply not thrive in much of the rest of the state. This interesting change may be observed while traveling through Ohio on Interstate 75 from Cincinnati to Toledo; the observant traveler of this diverse state may even catch a glimpse of Cincinnati's common wall lizard, one of the few examples of permanent "subtropical" fauna in Ohio.

The worst weather disaster in Ohio history occurred along the Great Miami River in 1913. Known as the Great Dayton Flood, the entire Miami River watershed flooded, including the downtown business district of Dayton. As a result, the Miami Conservancy District was created as the first major floodplain engineering project in Ohio and the United States.[109]

The highest recorded temperature was 113 Â°F (45 Â°C), near Gallipolis on July 21, 1934.[111] The lowest recorded temperature was −39 Â°F (−39 Â°C), at Milligan on February 10, 1899,[112] during the Great Blizzard of 1899.[113]

Although few have registered as noticeable to the average resident, more than 200 earthquakes with a magnitude of 2.0 or higher have occurred in Ohio since 1776.[114] The Western Ohio Seismic Zone and a portion of the Southern Great Lakes Seismic Zone are located in the state, and numerous faults lie under the surface.[114][115]

The most substantial known earthquake in Ohio history was the Anna (Shelby County) earthquake,[116] which occurred on March 9, 1937. It was centered in western Ohio, with a magnitude of 5.4, and was of intensity VIII.[117]

Other significant earthquakes in Ohio include:[118] one of magnitude 4.8 near Lima on September 19, 1884;[119] one of magnitude 4.2 near Portsmouth on May 17, 1901;[120] and one of 5.0 in LeRoy Township in Lake County on January 31, 1986, which continued to trigger 13 aftershocks of magnitude 0.5 to 2.4 for two months.[121][122]

Notable Ohio earthquakes in the 21st century include one occurring on December 31, 2011, approximately 4 kilometers (2.5 mi) northwest of Youngstown,[123] and one occurring on June 10, 2019, approximately 5 kilometers (3.1 mi) north-northwest of Eastlake under Lake Erie;[124] both registered a 4.0 magnitude.

There are 13 metropolitan statistical areas in Ohio, anchored by 16 cities, as defined by the U.S. Office of Management and Budget. Additionally, 30 Ohio cities function as centers of micropolitan statistical areas, urban clusters smaller than that of metropolitan areas. Ohio's three largest cities are Columbus, Cleveland, and Cincinnati.

Columbus is the capital of the state, near its geographic center, and is well known for Ohio State University. In 2019, the city had six corporations named to the U.S. Fortune 500 list: Alliance Data, Nationwide Mutual Insurance Company, American Electric Power, L Brands, Huntington Bancshares, and Cardinal Health in suburban Dublin.[125][126] Other major employers include hospitals (among others, Wexner Medical Center and Nationwide Children's Hospital), high tech research and development including the Battelle Memorial Institute, information-based companies such as OCLC and Chemical Abstracts Service, manufacturer Worthington Industries, and financial institutions such as JPMorgan Chase and Huntington Bancshares. Fast food chains Wendy's and White Castle are also headquartered in Columbus.

Located in Northeast Ohio along the Lake Erie shore, Cleveland is characterized by its New England heritage, ethnic immigrant cultures, and history as a major American manufacturing and healthcare center. It anchors the Cleveland–Akron–Canton Combined Statistical Area, of which the industrial cities of Akron and Canton are constituent parts. Mansfield, Sandusky and Youngstown are also major cities in the region. Northeast Ohio is known for major industrial companies Goodyear Tire and Rubber and Timken, top-ranked colleges Case Western Reserve University, Oberlin College, and Kent State University, the Cleveland Clinic, and cultural attractions including the Cleveland Museum of Art, Big Five member Cleveland Orchestra, Cuyahoga Valley National Park, Playhouse Square, the Pro Football Hall of Fame, and the Rock and Roll Hall of Fame.

Cincinnati anchors Southwest Ohio and the Cincinnati metropolitan area, which also encompasses counties in Kentucky and Indiana. The metropolitan area is home to Miami University and the University of Cincinnati, Cincinnati Union Terminal, Cincinnati Symphony Orchestra, and various Fortune 500 companies, including Procter & Gamble, Kroger, Macy's, Inc., and Fifth Third Bank. Dayton and Springfield are in the Miami Valley, which is home to the University of Dayton, the Dayton Ballet, and the extensive Wright-Patterson Air Force Base.

Toledo and Lima are the major cities in Northwest Ohio, an area known for its glass-making industry. It is home to Owens Corning and Owens-Illinois, two Fortune 500 corporations.

Steubenville is the only metropolitan city in Appalachian Ohio, a region known for its mixed mesophytic forests. Other metropolitan areas that contain cities in Ohio but are primarily in other states include the Huntington, West Virginia and Wheeling, West Virginia areas. Ohio is the US state with the highest number of cities with the same name as UK cities.[127]

From just over 45,000 residents in 1800, Ohio's population grew faster than 10% per decade (except for the 1940 census) until the 1970 census, which recorded just over 10.65 million Ohioans.[131] Growth then slowed for the next four decades.[132] The United States Census Bureau counted 11,808,848 in the 2020 census, a 2.4% increase since the 2010 United States census.[133] Ohio's population growth lags that of the entire United States, and whites are found in a greater density than the U.S. average. As of 2000[update], Ohio's center of population is located in Morrow County,[134] in the county seat of Mount Gilead.[135] This is approximately 6,346 feet (1,934 m) south and west of Ohio's population center in 1990.[134]

As of 2011, 27.6% of Ohio's children under the age of 1 belonged to minority groups.[136] Approximately 6.2% of Ohio's population was under five years of age, 23.7% under 18 years of age, and 14.1% were 65 or older; females made up an estimated 51.2% of the population.

According to HUD's 2022 Annual Homeless Assessment Report, there were an estimated 10,654 homeless people in Ohio.[137][138]

Note: Births in table do not add up because Hispanics are counted both by their ethnicity and by their race, giving a higher overall number.

In 2010, there were 469,700 foreign-born residents in Ohio, corresponding to 4.1% of the total population. Of these, 229,049 (2.0%) were naturalized U.S. citizens and 240,699 (2.1%) were not. The largest groups were:[154] Mexico (54,166), India (50,256), China (34,901), Germany (19,219), Philippines (16,410), United Kingdom (15,917), Canada (14,223), Russia (11,763), South Korea (11,307), and Ukraine (10,681). Though predominantly white, Ohio has large black populations in all major metropolitan areas throughout the state, Ohio has a significant Hispanic population made up of Mexicans in Toledo and Columbus, and Puerto Ricans in Cleveland and Columbus, and also has a significant and diverse Asian population in Columbus.

Ancestry groups (which the census defines as not including racial terms) in the state were:[155] 26.5% German, 14.1% Irish, 9.0% English, 6.4% Italian, 3.8% Polish, 2.5% French, 1.9% Scottish, 1.7% Hungarian, 1.6% Dutch, 1.5% Mexican, 1.2% Slovak, 1.1% Welsh, and 1.1% Scotch-Irish. Ancestries claimed by less than 1% of the population include Sub-Saharan African, Puerto Rican, Swiss, Swedish, Arab, Greek, Norwegian, Romanian, Austrian, Lithuanian, Finnish, West Indian, Portuguese and Slovene.

About 6.7% of the population age 5 years and older reported speaking a language other than English, with 2.2% of the population speaking Spanish, 2.6% speaking other Indo-European languages, 1.1% speaking Asian and Austronesian languages, and 0.8% speaking other languages. Numerically: 10,100,586 spoke English, 239,229 Spanish, 55,970 German, 38,990 Chinese, 33,125 Arabic, and 32,019 French. In addition, 59,881 spoke a Slavic language and 42,673 spoke another West Germanic language according to the 2010 census.[156] Ohio also had the nation's largest population of Slovene speakers, second largest of Slovak speakers, second largest of Pennsylvania Dutch (German) speakers, and the third largest of Serbian speakers.[157]

Religious self-identification, per Public Religion Research Institute's 2021 American Values Survey[158]

According to Public Religion Research Institute's 2021 American Values Survey, 64% of Ohioans identified as Christian. Specifically, 19% of Ohio's population identified as Mainline Protestant, 17% as Evangelical Protestant, 7% as Historically Black Protestant, and 18% as Catholic. Roughly 30% of the population were unaffiliated with any religious body. Small minorities of Jews (2%), Hindus (1%), Jehovah's Witnesses (<1%), Muslims (<1%), Buddhists (<1%), Mormons (<1%), and other faiths exist according to this study.[158] Altogether, those identifying with a religion or spiritual tradition were 70% of the state's population.

Per the Association of Religion Data Archives's (ARDA) 2020 study, Christianity remained the predominant religion. Non-denominational Christianity, numbering 1,411,863, were the largest Protestant cohort, although Catholicism remained the single-largest denomination with 1,820,233 adherents.[159] According to the ARDA, in 2010 the largest Christian denominations by adherents were the Catholic Church with 1,992,567; the United Methodist Church with 496,232; the Evangelical Lutheran Church in America with 223,253, the Southern Baptist Convention with 171,000, the Christian Churches and Churches of Christ with 141,311, the United Church of Christ with 118,000, and the Presbyterian Church (USA) with 110,000.[160] With about 80,000 adherents in 2020, Ohio had the second largest Amish population of all U.S. states, only behind neighboring Pennsylvania.[161]

According to a Pew Forum poll in 2014, a majority of Ohioans, 56%, felt religion was "very important", 25% that it was "somewhat important", and 19% that religion was "not too important/not important at all". Among them, 38% of Ohioans indicate that they attend religious services at least once weekly, 32% occasionally, and 30% seldom or never.[162]

According to the U.S. Census Bureau, the total number of people employed in 2016 was 4,790,178. The total number of unique employer establishments was 252,201, while the total number of non-employer establishments was 785,833.[163] In 2010, Ohio was ranked second in the country for best business climate by Site Selection magazine, based on a business-activity database.[164] The state has also won three consecutive Governor's Cup awards from the magazine, based on business growth and developments.[165] As of 2016[update], Ohio's gross domestic product (GDP) was $626 billion.[166] This ranks Ohio's economy as the seventh-largest among all 50 states and Washington, D.C.[167]

The Small Business & Entrepreneurship Council ranked the state No. 10 for best business-friendly tax systems in their Business Tax Index 2009, including a top corporate tax and capital gains rate that were both ranked No. 6 at 1.9%.[168] Ohio was ranked No. 11 by the council for best friendly-policy states according to their Small Business Survival Index 2009.[169] The Directorship's Boardroom Guide ranked the state No. 13 overall for best business climate, including No. 7 for best litigation climate.[170] Forbes ranked the state No. 8 for best regulatory environment in 2009.[171] Ohio has five of the top 115 colleges in the nation, according to U.S. News & World Report's 2010 rankings,[172] and was ranked No. 8 by the same magazine in 2008 for best high schools.[173]

Ohio's unemployment rate stands at 4.5% as of February 2018,[174] down from 10.7% in May 2010.[175][176] The state still lacks 45,000 jobs compared to the pre-recession numbers of 2007.[177] The labor force participation as of April 2015 is 63%, slightly above the national average.[177] As of 2023[update], Ohio's per capita income was $60,402, ranking 38th in the U.S., and the state's median household income was $65,720.[178][179] Also in 2023, 13.4% of the population was living below the poverty line.[180]

The manufacturing and financial activities sectors each compose 18.3% of Ohio's GDP, making them Ohio's largest industries by percentage of GDP.[167] Ohio has the third largest manufacturing workforce behind California and Texas.[181][182] Ohio has the largest bioscience sector in the Midwest, and is a national leader in the "green" economy. Ohio is the largest producer in the country of plastics, rubber, fabricated metals, electrical equipment, and appliances.[183] 5,212,000 Ohioans are currently employed by wage or salary.[167]

By employment, Ohio's largest sector is trade/transportation/utilities, which employs 1,010,000 Ohioans, or 19.4% of Ohio's workforce, while the health care and education sector employs 825,000 Ohioans (15.8%).[167] Government employs 787,000 Ohioans (15.1%), manufacturing employs 669,000 Ohioans (12.9%), and professional and technical services employs 638,000 Ohioans (12.2%).[167] Ohio's manufacturing sector is the third-largest of all fifty United States states in terms of gross domestic product.[167] Fifty-nine of the United States' top 1,000 publicly traded companies (by revenue in 2008) are headquartered in Ohio, including Procter & Gamble, Goodyear Tire & Rubber, AK Steel, Timken, Abercrombie & Fitch, and Wendy's.[184]

Ohio is also one of 41 states with its own lottery,[185] the Ohio Lottery.[186] As of 2020[update], the Ohio Lottery has contributed more than $26 billion to education beginning in 1974.[187]

Income inequality in Ohio, both before and after taxes, has risen significantly since the 1970s.[188] Ohio's overall income grew in Ohio from 2009 to 2012, with an overall 7.1% increase in income growth. The top 1% had a 37.0% in income growth, while the bottom 99% grew their income by only 2.3%. The top 1% accounted for 71.9% of the overall shared income during this period.[189] The burden of income tax falls disproportionately on lower-income tax brackets. In 2018, the bottom 20% of earners contributed 12.3% of their income towards various taxes, while the top 1% only paid 6.5%.[190]

Ohio is home to 30 art institutions, including the Columbus Museum of Art, Cincinnati Art Museum, Cleveland Museum of Art, and other entities. The full list includes:

The Cincinnati Art Museum holds over 100,000 works spanning 6,000 years of human history, being among the most comprehensive collections in the Midwest. Among its notable collections are works by Master of San Baudelio, Jorge Ingles, Sandro Botticelli (Judith with Head of Holofernes), Matteo di Giovanni, Domenico Tintoretto (Portrait of Venetian dux Marino Grimani), Mattia Preti, Bernardo Strozzi, Frans Hals, Bartolomé Esteban Murillo (St. Thomas of Villanueva), Peter Paul Rubens (Samson and Delilah) and Aert van der Neer. The collection also includes works by Jean-Baptiste-Camille Corot, Pierre-Auguste Renoir, Camille Pissarro, Claude Monet (Rocks At Belle Isle), and Pablo Picasso. The museum also has a large collection of paintings by American painter Frank Duveneck (Elizabeth B. Duveneck).

The Cleveland Museum of Art is internationally renowned for its substantial holdings of Asian and Egyptian art, and has a permanent collection of more than 61,000 works from around the world.[192] It is the fourth-wealthiest art museum in the United States.[193]

The Columbus Museum of Art holds nineteenth and early twentieth-century American and European art, including early Cubist paintings by Pablo Picasso and Juan Gris, works by François Boucher, Paul Cézanne, Mary Cassatt, Jean Auguste Dominique Ingres, Edgar Degas, Henri Matisse, Claude Monet, Edward Hopper, and Norman Rockwell, and installations by Mel Chin, Josiah McElheny, Susan Philipsz, and Allan Sekula. Also in Columbus, the Billy Ireland Cartoon Library & Museum collection includes 450,000 original cartoons, 36,000 books, 51,000 serial titles, and 3,000 feet (910 m) of manuscript materials, plus 2.5 million comic strip clippings and tear sheets, making it the largest research library for cartoon art.

Youngstown's Butler Institute of American Art was the first museum dedicated exclusively to American art.[194]

Playhouse Square in downtown Cleveland is the nation's second-largest performing arts center, home to ten theaters.[195] The Columbus Association for the Performing Arts manages seven historic Columbus area theaters.[196]

Buckeye candy is a local specialty, popular in the state of Ohio. The confection is a variation of standard peanut butter cups known as a 'Buckeye'. Coated in chocolate, with a partially exposed center of peanut butter fudge, the candy resembles the appearance of the nut that grows on the state tree, commonly known as the buckeye.

Cincinnati-style chili is a Greek-inspired meat sauce, (ground beef seasoned with cinnamon, nutmeg, allspice, cloves, bay leaf, cumin, chili powder, and in some home recipes, chocolate), used as a topping for spaghetti or hot dogs. Additionally, red beans, chopped onions, and shredded cheese are offered as extra toppings referred to as "ways."[197]

The Rock and Roll Hall of Fame and the Rhythm and Blues Music Hall of Fame are both located in Cleveland. Cleveland disc jockey Alan Freed is credited with coining the term and promoting rock and roll in the early 1950s. Cincinnati is home to the American Classical Music Hall of Fame and Museum. Six Ohio musicians are Rock and Roll Hall of Fame members, Dave Grohl (Nirvana and Foo Fighters), the Isley Brothers, Nine Inch Nails, Bobby Womack, Benjamin Orr (The Cars), and Chrissie Hynde (The Pretenders). Also inducted was disk jockey Alan Freed.

Other popular musicians from Ohio include Mamie Smith, Dean Martin, Tyler Joseph and Josh Dun of Twenty One Pilots, Frankie Yankovic, Doris Day, the McGuire Sisters, Howard Hewett, Shirley Murdock, Boz Scaggs, John Legend, Marilyn Manson, Starset, Dan Auerbach and Patrick Carney of the Black Keys, Griffin Layne, Joe Dolce, Kid Cudi, William "Bootsy" Collins, Stephanie Eulinberg of Kid Rock's Twisted Brown Trucker Band, and Devo.

The Cleveland Orchestra is one of the historic Big Five orchestras in the U.S. and considered among the best worldwide.[198] Many other Ohio cities are home to their own orchestras, including Akron, Blue Ash, Canton, Cincinnati, Columbus, Dayton, Toledo, and Youngstown. Cincinnati is home to its own ballet, symphony orchestra, pops orchestra, and opera, all housed at the Cincinnati Music Hall. Dayton is also home to a ballet, orchestra, and opera, collectively known as the Dayton Performing Arts Alliance.

Within the marching arts, Winter Guard International has hosted national championships in performing arts at the University of Dayton 18 times between 1983 and 2003, and has permanently since 2005. The Bluecoats Drum and Bugle Corps are Ohio's highest fielding drum corps, competing in the Drum Corps International World Class circuit out of Canton.

Ohio is home to eight professional sports teams across the five different major leagues in the United States. Current teams include the Cincinnati Reds and Cleveland Guardians of Major League Baseball,[199][200] the Columbus Crew and FC Cincinnati of Major League Soccer,[201] the Cleveland Cavaliers of the National Basketball Association,[202] the Cincinnati Bengals and Cleveland Browns of the National Football League,[203] and the Columbus Blue Jackets of the National Hockey League.[204]

Ohio has brought home seven World Series titles (Reds 1919, 1940, 1975, 1976, 1990; Indians 1920, 1948), three MLS Cups (Crew 2008, 2020, 2023), one NBA Championship (Cavaliers 2016), and nine NFL Championships (Pros 1920; Bulldogs 1922, 1923, 1924; Rams 1945; Browns 1950, 1954, 1955, 1964). Despite this success in the NFL in the first half of the 20th century, no Ohio team has won the Super Bowl since its inception in 1967. No Ohio team has made an appearance in the Stanley Cup Finals.

Ohio played a central role in the development of both Major League Baseball and the National Football League. Baseball's first fully professional team, the Cincinnati Red Stockings of 1869, were organized in Ohio.[205] An informal early-20th-century American football association, the Ohio League, was the direct predecessor of the modern NFL, although neither of Ohio's modern NFL franchises trace their roots to an Ohio League club. The NFL itself was founded in Canton in 1920 as the American Professional Football Conference. The first official game occurred on October 3, 1920, when the Dayton Triangles beat the Columbus Panhandles 14–0 in Dayton. Canton was enshrined as the home of the Pro Football Hall of Fame in 1963.

On a smaller scale, Ohio hosts minor league baseball, arena football, indoor football, mid-level hockey, and lower division soccer.

The Mid-Ohio Sports Car Course has hosted several auto racing championships, including CART World Series, IndyCar Series, NASCAR Nationwide Series, Can-Am, Formula 5000, IMSA GT Championship, American Le Mans Series and Rolex Sports Car Series. The Grand Prix of Cleveland also hosted CART races from 1982 to 2007. The Eldora Speedway is a major dirt oval that hosts NASCAR Camping World Truck Series, World of Outlaws Sprint Cars and USAC Silver Crown Series races.

Ohio hosts two PGA Tour events, the WGC-Bridgestone Invitational and Memorial Tournament. The Cincinnati Open is an ATP World Tour Masters 1000 and WTA 1000 tennis tournament.

Ohio has eight NCAA Division I Football Bowl Subdivision college football teams, divided among three different conferences. It has also experienced considerable success in the secondary and tertiary tiers of college football divisions.

There are two programs in the Power Five conferences; the Ohio State Buckeyes of the Big Ten Conference and the Cincinnati Bearcats of the Big 12 Conference. The Ohio State Buckeyes football team is second in all-time winning percentage, with a 931–327–53 overall record and a 28–29 bowl record as of 2023. The program has produced seven Heisman Trophy winners, forty conference titles, and eight undisputed national championships. The men's basketball program has appeared in the NCAA Division I men's basketball tournament 27 times.

The Cincinnati Bearcats men's basketball team has over 1,800 wins and 33 March Madness appearances, whilst the Bearcats football team became the first so-called "Group of Five" team to qualify to the College Football Playoff in 2022.[206]

In the Group of Five conferences, six teams are represented in the Mid-American Conference: the Akron Zips, Bowling Green Falcons, Kent State Golden Flashes, Miami RedHawks, Ohio Bobcats and the Toledo Rockets. The MAC headquarters are in Cleveland. The Cincinnati–Miami rivalry game has been played in southwest Ohio every year since 1888 and is the oldest current non-conference NCAA football rivalry. Other Division I schools, either part of the NCAA Division I Football Championship Subdivision or not fielding in football include the Cleveland State Vikings, Xavier Musketeers, Wright State Raiders, and Youngstown State Penguins. Xavier's men's basketball has performed particularly well, with 27 March Madness appearances. Youngstown State's football has the third most NCAA Division I Football Championship wins, with 3.

There are 12 NCAA Division II universities and 22 NCAA Division III universities in Ohio.

The state government of Ohio consists of the executive, legislative, and judicial branches.[207][208][209]

The executive branch is headed by the governor of Ohio.[207] The current governor is Mike DeWine since 2019, a member of the Republican Party.[210] A lieutenant governor succeeds the governor in the event of any removal from office, and performs any duties assigned by the governor.[211][212] The current lieutenant governor is Jon Husted. The other elected constitutional offices in the executive branch are the secretary of state (Frank LaRose), auditor (Keith Faber), treasurer (Robert Sprague), and attorney general (Dave Yost).[207] There are 21 state administrative departments in the executive branch.[213][214]

The Ohio General Assembly is a bicameral legislature consisting of the Senate and House of Representatives.[215] The Senate is composed of 33 districts, each of which is represented by one senator. Each senator represents approximately 330,000 constituents.[216] The House of Representatives has 99 members.[217] The Republican Party is the majority party in both houses as of the 2022 election cycle.

In order to be enacted into law, a bill must be adopted by both houses of the General Assembly and signed by the governor. If the governor vetoes a bill, the General Assembly can override the veto with a three-fifths supermajority of both houses. A bill will also become a law if the governor fails to sign or veto it within 10 days of its being presented. The session laws are published in the official Law of Ohio.[218] These in turn have been codified in the Ohio Revised Code.[219] The General Assembly, with the approval of the governor, draws the U.S. congressional district lines for Ohio's 16 seats in the United States House of Representatives. The Ohio Apportionment Board draws state legislative district lines in Ohio.

There are three levels of the Ohio state judiciary. The lowest is the court of common pleas: each county maintains its own constitutionally mandated court of common pleas, which maintain jurisdiction over "all justiciable matters".[220] The intermediate-level court system is the district court system.[221] Twelve courts of appeals exist, each retaining jurisdiction over appeals from common pleas, municipal, and county courts in a set geographical area.[220] A case heard in this system is decided by a three-judge panel, and each judge is elected.[220]

The state's highest-ranking court is the Ohio Supreme Court.[222] A seven-justice panel composes the court, which, by its own discretion, hears appeals from the courts of appeals, and retains original jurisdiction over limited matters.[223]

There are also several levels of local government in Ohio: counties, municipalities (cities and villages), townships, special districts, and school districts.

Ohio is divided into 88 counties.[224] Ohio law defines a structure for county government, although they may adopt charters for home rule.[225][226] Summit County[225] and Cuyahoga County[227] have chosen an alternate form of government. The other counties have a government with a three-member board of county commissioners,[228] a sheriff,[229] coroner,[230] auditor,[231] treasurer,[232] clerk of the court of common pleas[233] prosecutor,[234] engineer,[235] and recorder.[236]

There are two kinds of incorporated municipalities, 251 cities and 681 villages.[225][237][238] If a municipality has five thousand or more residents as of the last United States Census it is a city, otherwise it is a village.[225][239] Municipalities have full home rule powers, may adopt a charter, ordinances and resolutions for self-government.[240] Each municipality chooses its own form of government, but most have elected mayors and city councils or city commissions. City governments provide much more extensive services than county governments, such as police forces and paid (as opposed to volunteer) fire departments.

The entire area of the state is encompassed by townships.[225] When the boundaries of a township are coterminous with the boundaries of a city or village, the township ceases to exist as a separate government (called a paper township).[225] Townships are governed by a three-member board of township trustees.[225] Townships may have limited home rule powers.[241]

There are more than 600 city, local, and exempted village school districts providing K-12 education in Ohio, as well as about four dozen joint vocation school districts, which are separate from the K-12 districts. Each city school district, local school district, or exempted village school district is governed by an elected board of education.[225] A school district previously under state supervision (municipal school district) may be governed by a board whose members either are elected or appointed by the mayor of the municipality containing the greatest portion of the district's area.[225]

Historian R. Douglas Hurt asserts that not since Virginia "had a state made such a mark on national political affairs" as Ohio.[243] The Economist notes that "This slice of the mid-west contains a bit of everything American—part north-eastern and part southern, part urban and part rural, part hardscrabble poverty and part booming suburb".[244]

Ohio is considered a moderately Republican-leaning state politically.[245][246] It had been a swing state in the late 20th and early 21st centuries; this status was called into question after the state voted for Republican Donald Trump at larger margins than the nation as a whole in the 2016, 2020 and 2024 presidential elections.[247][248] It has also been considered a bellwether state.[249][250] Since 1896, Ohio has had only three misses in the general election (1944, 1960, 2020) and had the longest perfect streak of any state, voting for the winning presidential candidate in each election from 1964 to 2016 and in 34 of the 39 held since the American Civil War. No Republican has ever won the presidency without winning Ohio.

As of 2024, there are more than 8 million registered Ohioan voters, of which over 70% are not affiliated with any political party. They are disproportionate in age, with a million more over 65 than there are 18- to 24-year-olds.[251] Since the 2010 midterm elections, Ohio's voter demographic has leaned towards the Republican Party.[252]

The governor, Mike DeWine, is Republican, as are all other non-judicial statewide elected officials. In the Ohio State Senate the Republicans are the majority, 25–8, and in the Ohio House of Representatives the Republicans control the delegation 64–35.

Following the 2020 census, Ohio has 15 seats in the U.S. House of Representatives.[253] As of the 2022 election cycle, ten federal representatives are Republicans while five are Democrats. Marcy Kaptur (D-09) is the most senior member of the Ohio delegation to the U.S. House of Representatives.[254] The senior U.S. senator, Sherrod Brown, is a Democrat, while the junior, JD Vance, is a Republican.[255][256]

Six U.S. presidents hailed from Ohio at the time of their elections, giving rise to its nickname "mother of presidents", a sobriquet it shares with Virginia. It is also termed "modern mother of presidents", in contrast to Virginia's status as the origin of presidents earlier in American history. Virginia-born William Henry Harrison lived much of his life in North Bend, Ohio, was elected from the state and is also buried there. The other five presidents are Rutherford B. Hayes, James A. Garfield, William McKinley, William Howard Taft and Warren G. Harding.[257] Seven presidents were born in Ohio, making it second to Virginia's eight; in addition to the aforementioned five, Ulysses S. Grant was elected from Illinois and Benjamin Harrison was elected from Indiana.[257]

In a 2020 study, Ohio was ranked as the 17th hardest state for citizens to vote in.[258] Since 1994, the state has had a policy of purging infrequent voters from its rolls. In April 2016, a lawsuit was filed, challenging this policy on the grounds that it violated the National Voter Registration Act (NVRA) of 1993[259] and the Help America Vote Act of 2002.[260] In June, the federal district court ruled for the plaintiffs and entered a preliminary injunction applicable only to the November 2016 election. The preliminary injunction was upheld in September by the Court of Appeals for the Sixth Circuit. Had it not been upheld, thousands of voters would have been purged from the rolls just a few weeks before the election.[259][261]

Ohio's system of public education is outlined in Article VI of the state constitution, and in Title XXXIII of the Ohio Revised Code. Substantively, Ohio's system is similar to those found in other states. At the State level, the Ohio Department of Education governs primary and secondary educational institutions. At the municipal level, there are approximately 700 school districts statewide. The Ohio Board of Regents coordinates and assists with Ohio's institutions of higher education.

Ohio is home to several public and private institutions of higher learning. Prior to statehood, the Northwest Ordinance of 1787 included a provision to establish an institution of higher education in the region, resulting in the establishment of Ohio University in 1804 as Ohio's first college.[263][264][265] The University System of Ohio includes all of Ohio's public institutions of higher education. It includes 14 four-year research universities, 24 branch and regional campuses, and 23 community colleges and technical colleges. Ohio State University is the largest of the system, with over 60,000 students at its main campus in Columbus.[262]

Kenyon College is the state's oldest private liberal arts college, established in 1824 by an Episcopal bishop to train clergy on the Ohio frontier. Oberlin College, established in 1833, was among the earliest colleges in the US to admit African Americans in 1835, and became the first to admit women in 1837.[266]

The Carnegie Foundation classifies five of the state's institutions as tier 1 research universities: Case Western Reserve University, Kent State University, Ohio State University, Ohio University, and the University of Cincinnati.[267]

Ohio is home to some of the nation's highest-ranked public libraries.[268] Major metropolitan public library systems include the Cleveland Public Library, the Cuyahoga County Public Library, the Cincinnati and Hamilton County Public Library, and the Columbus Metropolitan Library. The Ohio Public Library Information Network provides Ohio residents with internet access to their 251 public libraries. It also provides Ohioans with free home access to high-quality, subscription research databases.

The OhioLINK library consortium provides Ohio's college and university libraries with mutual access to their collections. The program allows researchers access to books and other media that might not be otherwise available. CLEVNET, another major library consortium, is based at the Cleveland Public Library and includes 47 public library systems in Northeast Ohio.[269]

Many major east–west transportation corridors go through Ohio. One of those pioneer routes, known in the early 20th century as "Main Market Route 3", was chosen in 1913 to become part of the historic Lincoln Highway which was the first road across America, connecting New York City to San Francisco. In Ohio, the Lincoln Highway linked many towns and cities together, including Canton, Mansfield, Wooster, Lima, and Van Wert. The Lincoln Highway's arrival in Ohio was a major influence on the state's development. Upon the advent of the federal numbered highway system in 1926, the Lincoln Highway through Ohio became U.S. Route 30.

Ohio is home to 228 miles (367 km) of the National Road, now U.S. Route 40.

Ohio has a highly developed network of roads and interstate highways. Major east-west through routes include the Ohio Turnpike (I-80/I-90) in the north, I-76 through Akron to Pennsylvania, I-70 through Columbus and Dayton, and the Appalachian Highway (State Route 32) running from West Virginia to Cincinnati. Major north–south routes include I-75 in the west through Toledo, Dayton, and Cincinnati, I-71 through the middle of the state from Cleveland through Columbus and Cincinnati into Kentucky, and I-77 in the eastern part of the state from Cleveland through Akron, Canton, New Philadelphia and Marietta south into West Virginia. Interstate 75 between Cincinnati and Dayton is one of Ohio's most heavily traveled sections of interstate.

Ohio has a highly developed network of signed state bicycle routes. Many of them follow rail trails, with conversion ongoing. The Ohio to Erie Trail (route 1) connects Cincinnati, Columbus, and Cleveland. U.S. Bicycle Route 50 traverses Ohio from Steubenville to the Indiana state line outside Richmond.[270]

Ohio has several long-distance hiking trails, the most prominent of which is the Buckeye Trail, which extends 1,444 mi (2,324 km) in a loop around the state. Part of it is on roads and part on wooded trail. Additionally, the North Country Trail (the longest of the 11 National Scenic Trails authorized by Congress) and the American Discovery Trail (a system of recreational trails and roads that collectively form a coast-to-coast route across the mid-tier of the United States) pass through Ohio. Much of these two trails coincide with the Buckeye Trail.

Ohio has an extensive rail network, though today most lines carry only freight traffic. Three Class I freight railroads operate in Ohio: CSX Transportation, Norfolk Southern Railway, and Canadian National Railway. Many local freight carriers also exist in the state.

Amtrak, the national passenger railroad, operates three long-distance rail routes through Ohio. The Lake Shore Limited serves Cleveland, Elyria, Toledo, Sandusky, and Bryan. The Capitol Limited stops in those cities as well as in Alliance. The Cardinal serves Cincinnati Union Terminal. From Ohio, passengers can ride directly to Chicago, New York, Boston, Washington, D.C., Indianapolis, Pittsburgh, Buffalo, and dozens of destinations in-between.

Columbus is the largest city in the U.S. with no passenger rail. Its Union Station was last served in 1979 by the National Limited.

Ohio is home to several scenic railways and museums, including the Cuyahoga Valley Scenic Railroad through Cuyahoga Valley National Park, the Age of Steam Roundhouse museum, and the Hocking Valley Scenic Railway near Hocking Hills State Park.

Mass transit exists in many forms in Ohio cities, primarily through bus systems. The Greater Cleveland Regional Transit Authority (GCRTA) operates the RTA Rapid Transit system, which consists of one heavy rail line, three light rail lines, and three bus rapid transit lines. Cincinnati is served by the Southwest Ohio Regional Transit Authority (SORTA) bus network as well as a 3.6-mile (5.8 km) streetcar line, the Cincinnati Bell Connector. Other major transit agencies in Ohio include the Central Ohio Transit Authority (COTA) serving Columbus and the Greater Dayton Regional Transit Authority (GDRTA) serving Dayton.

Ohio has four international airports, four commercial, and two military. The four international include Cleveland Hopkins International Airport, John Glenn Columbus International Airport, Dayton International Airport, and Rickenbacker International Airport (one of two military airfields). The other military airfield is Wright Patterson Air Force Base which is one of the largest Air Force bases in the United States. Other major airports are in Toledo and Akron. Cincinnati's main airport, Cincinnati/Northern Kentucky International Airport, is in Hebron, Kentucky, and therefore is not included in Ohio airport lists.