Gulfport is a city in and a co-county seat of Harrison County, Mississippi, United States. It is the second-most populous city in Mississippi, after Jackson, and part of the Gulfport–Biloxi metropolitan area. As of the 2020 census, Gulfport has a population of 72,926; the metro area has a population of 416,259. Gulfport lies along the gulf coast of the United States in southern Mississippi, taking its name from its port on the Gulf Coast on the Mississippi Sound. It is home to the U.S. Navy Atlantic Fleet Seabees.

Gulfport emerged from two earlier settlements, Mississippi City and Handsboro. Founded in 1887 by William H. Hardy as a terminus for the Gulf and Ship Island Railroad, the city was further developed by Philadelphia oil tycoon Joseph T. Jones, who funded the railroad, harbor, and channel dredging. The city was officially incorporated in 1898. By the early 20th century, Gulfport had become the largest lumber export city in the United States, though this faded with the depletion of Mississippi's Piney Woods. The city transitioned into tourism through its white beaches, grand hotels, and significant casino gaming operations.

The largest sectors of Gulfport's economy include military operations, tourism, healthcare, and maritime commerce. The city is home to the Naval Construction Battalion Center, Gulfport Combat Readiness Training Center, and Mississippi Gulf Coast Community College. The Port of Gulfport serves as one of the busiest ports in the Gulf of Mexico, while Gulfport-Biloxi International Airport provides commercial air service to the region. Despite significant impacts from Hurricane Camille in 1969 and Hurricane Katrina in 2005, the city has consistently rebuilt and expanded its infrastructure and facilities.

Two villages predated the founding of Gulfport: Mississippi City, located along the gulf, and Handsboro, founded in the 1800s along the northern bayous. Mississippi City was born out of the Mississippi City Company that was formed in 1837 to build a town to serve as the terminus for the Gulf and Ship Island Railroad. The purpose of the railroad was to transfer yellow pine for ship-based trade. While a depression led to the abandonment of the railroad, the town was neverthless built and later made the county seat upon the creation of Harrison County in 1841.

The Gulf and Ship Island Railroad company was later reorganized and selected William H. Hardy as its president. Desiring to connect the railroad from the town of Hattiesburg, which he founded, to the coast, he steered away from Mississippi City because of its lack of proximity to deep water. He selected the site of Gulfport in 1887, and the town was founded that year. Because of the cost of the project, Hardy went bankrupt in 1893, and the town became a ghost town. However, Philadelphia oil tycoon Joseph T. Jones purchased the company. Jones funded not only the railroad, but much of the city, the harbor, and the dredging of the channel. In 1888, the city was given its name from the Jackson Clarion-Ledger editor, R. H. Henry after a conversation between him and Hardy. On July 28, 1898, the city was incorporated. In 1902, Harrison County voted to move the county seat to Gulfport.

In 1900, the railroad was completed, and in 1902 the Port of Gulfport was completed. On April 28, 1904, the Treasury Department changed the port of entry for the district of the Pearl River from Shieldsboro to Gulfport. At the time, the Gulport port had greater ease of access than comparable ports like Mobile or New Orleans. The port soon made Gulfport the largest lumber export city in the United States, shipping over 293 million feet of lumber in 1906; however, the depletion of the yellow pine ended this status in the early 20th century.

At the turn of the century, Gulfport began to experience notable growth: by 1900, the population hit 1,000, and by 1910, over 6,000. As a result, the fire department and sanitation services were established, and by 1903, the county courthouse was built. The Louisville and Nashville railroad line also began serving the city around this time at Gulfport Station (then the Union Depot). In 1910, the U.S. Post Office and Customhouse was built, and in March 1916, the construction of a Carnegie Library was announced by the mayor. Other impressive developments include the building of the Great Southern Hotel, the construction of an electirc plant (later managed by Mississippi Power), and a streetcar line.

In 1917, the city was set to hold the Mississippi Centennial Exposition, but upon the U.S. entering World War I, the plans were abandonded. The building complex created for the exposition was transferred to the U.S. Navy as a training center. The lands were eventually transitioned into a Veterans Admnistration Hospital, which operated until 2005. The 1920s saw a construction boom with buildings like the Hotel Markham and the Bank of Gulfport being completed. By the 1930s, the population had increased to over 12,000, with growth continuing into the 1940s.

During World War II, two military bases were built in Gulfport. Camp Hollyday, established in 1942, would later become the home base for the Naval Construction Battalion Center. Also in 1942, the U.S. Army Air Corps constructed a training base for heavy bomber crews known as Gulfport Army Airfield. After the war, the base was declared excess, and the city purchased most of the facilities for a new Gulfport Municipal Airport (the first airpot was dedicated in 1930). In 1954, the U.S. Air Force resumed use of the facilities they still owned as Gulfport Air Force Base to train Air National Guard units. This lasted until 1958, when the facilities were transfered to the Mississippi Air National Guard as the Gulfport Combat Readiness Training Center.

By 1950, the population had grown to around 22,000 and by 1960, 30,000. Around the time of the Biloxi wade-ins, Gulfport had its own protest wade-in in 1960. In 1965, the city annexed the original Mississippi City and Handsboro area. On August 17, 1969, Gulfport and the Mississippi Gulf Coast were hit by Hurricane Camille, the second-strongest hurricane to make landfall in the U.S. in recorded history. The most heavily damaged part of Gulfport was the waterfront areas: storm waters in Gulfport reached 21 feet, and the port of Gulfport was nearly completely destroyed. Otherwise, the downtown and inland areas received small amounts of structural damage.

In 1976, the Armed Forces Retirement Home relocated from Philadelphia to Gulfport on the land of the former Gulf Coast Military Academy. The facility was destroyed in 2005 by Hurricane Katrina but rebuilt as a much larger facility in 2010. A new county courthouse was bulit in 1977. In 1993, the city opened its first two casinos, and later that year in December, the city annexed 33 square miles (85 km2) north of Gulfport. This annexed land included Turkey Creek, a historic community founded by emanicipated slaves before the founding of Gulfport. In 2003, the Dan M. Russell Jr. United States Courthouse was completed.

On August 29, 2005, Gulfport was hit by the strong eastern side of Hurricane Katrina. Gulfport was hit by winds with speeds of at least 100 miles per hour (160 km/h) and storm surge of at least 19 feet (5.8 m). 9,571 houses were damaged or destroyed, and the town was left with a $3 million deficit. The city received over $300 million in federal aid which it used to repair infrastructure and facilities for essential services. In 2020, on the 15th anniversary of Hurricane Katrina, the Mississippi Aquarium opened, replacing a dolphin-oriented facility destroyed by the hurricane.

According to the United States Census Bureau, the city had a total area of 64.2 sq mi (166.4 km2), of which 56.9 sq mi (147.4 km2) is land and 7.3 sq mi (19.0 km2) (11.40%) is water.

Gulfport Formation, here named in Harrison Co., southeastern MS, described as barrier ridge composed of white, medium- to fine-grained sand, yellow-orange near surface. Thickness ranges form 5.0 to 9.5 m. Overlies Biloxi Formation. Age is late Pleistocene.

Gulfport Formation is limited to a 1- to 3-km-wide discontinuous barrier ridge belt that borders the Gulf mainland shore. Commonly overlies Prairie Formation (alluvium) landward and Biloxi Formation (shelf deposits) near shore. Grades upward from poorly to moderately sorted shoreface sands to foreshore sand and dunes. Fig. 1 shows unit extending from Gulfport, MS, eastward to the mouth of the Ochlockonee River, Franklin County, Florida. Deposited during the Sangamonian.

The city listed 39 official neighborhoods in 2000. These neighborhoods are sometimes subdivisions or accumulations of gradual home development. These include:

Gulfport has a humid subtropical climate, which is strongly moderated by the Gulf of Mexico. Winters are short and generally mild; cold spells do occur, but seldom last long. Snow flurries are rare in the city, with no notable accumulation occurring most years. Summers are generally long, hot and humid, though the city's proximity to the Gulf prevents extreme summer highs, as seen farther inland. Gulfport is subject to extreme weather, most notably tropical storm activity through the Gulf of Mexico. The all-time record high for the city is 107 Â°F (41.7 Â°C), set on August 26, 2023, and the record coldest is 1 Â°F (−17.2 Â°C) on February 12, 1899. Climate records for the city date back to 1893; however, until 1998 records were stitched with neighboring Biloxi.

As of the 2020 United States census, there were 72,926 people, 25,559 households, and 15,584 families residing in the city.

Gulfport is part of the Gulfport–Biloxi metropolitan area, which has a population of 416,259.

According to Gulfport's 2020 Comprehensive Annual Financial Report, the top employers in the city were:

From its beginnings as a lumber port, Gulfport evolved into a diversified city. With about 6.7 miles (10.8 kilometres) of white sand beaches along the Gulf of Mexico, Gulfport has become a tourism destination, due in large part to Mississippi's coast casinos. Gulfport has served as host to popular cultural events such as the "World's Largest Fishing Rodeo," "Cruisin' the Coast" (a week of classic cars), "Black Spring Break" and "Smokin' the Sound" (speedboat races). Gulfport is a thriving residential community with a strong mercantile center. There are historic neighborhoods and home sites, as well as diverse shopping opportunities and several motels scattered throughout to accommodate golfing, gambling, and water-sport tourism. Gulfport is also home to the Island View Casino, one of twelve casinos on the Mississippi Gulf Coast.

Mississippi Aquarium opened August 29, 2020. The 5.8-acre (2.3 ha) complex incorporates both indoor and outdoor habitats with more than 200 species of animals and 50 species of native plants.

Fort Massachusetts is a fort on West Ship Island along the coast. It was built following the War of 1812 and remained in use until 1903. Currently, it is a historical tourist attraction within the Gulf Islands National Seashore.

Turkey Creek Community Historic District is a settlement established by emancipated African Americans during the Reconstruction Era after the American Civil War.

Gulfport uses a strong mayor-council form of government. The city is subdivided into seven wards, where members are elected as part of the Gulfport City Council. The current mayor is Billy Hewes who is serving his third term in office.

The Gulfport Police Department has 160 sworn personnel and 80 civilian staff. It is assisted by the U.S. Coast Guard, which operates 9 boats out of the port of Gulfport, 4 of which are Patrol Boats. The Gulfport station has 110 members which include Active, Reserve and Coast Guard Auxiliary who respond to an average of 300 search and rescue cases annually.

The Gulfport Fire Department was founded in 1908 and currently provides fire suppression, HAZMAT response, and technical rescue services within the city limits of Gulfport, Mississippi . The GFD operates out of 11 active stations and is staffed by professional firefighters. The GFD works in conjunction with American Medical Response for EMS related emergencies.

The City of Gulfport is served by the Gulfport School District and the Harrison County School District. The Harrison County Campus of Mississippi Gulf Coast Community College is also located in Gulfport.

Before Hurricane Katrina, William Carey University had a satellite campus in Gulfport. In 2009, the university moved to its new Tradition Campus, constructed off Mississippi Highway 67 in north Harrison County.

The Gulf Park Campus of the University of Southern Mississippi is located in Long Beach, just west of Gulfport. In 2012, repairs and renovations to campus buildings were still in progress following extensive damage in 2005 by Hurricane Katrina.

Headquartered in Gulfport, The Sun Herald is the local newspaper for Gulfport, Biloxi, and other Gulf Coast cities. The paper won the 2006 Pulitzer Prize in journalism for its Katrina coverage.

There are six FM radio stations licensed in Gulfport: W209CF 89.7, WA0Y 91.7 (American Family Radio), WGBL 96.7, WGCM-FM 102.3, WAIP-LP 103.9, and WLGF 107.1 (K-Love). There are also three AM radio stations licensed in Gulfport, all with FM translators: WQFX 1130 (W254DJ 98.7), WGCM 1240 (W265DH 100.9), and WROA 1390 (W261CU 100.1).

It is also served by two television stations, the ABC affiliate WLOX and CBS affiliate WLOX-DT2, as well as the Fox affiliate WXXV on 25.1, NBC affiliate on 25.2, CW+ affiliate on 25.3, and Defy TV affiliate on 25.4. WLOX won the Peabody Award for its Hurricane Katrina coverage.

Movies and TV series filmed in Gulfport include the 2016 film Precious Cargo, the 2017 TV movie Christmas in Mississippi, the 2015 TV series The Astronaut Wives Club, and other productions.

Gulfport/Biloxi and the Gulf Coast area is served by the Gulfport–Biloxi International Airport.

The Coast Transit Authority provides bus service to the region with fixed-route and paratransit services.

Major roads and highways serve Gulfport. Interstate 10 runs east–west through the middle section of Gulfport. U.S. 90, following the coast in this region, runs east–west through the downtown area. U.S. 49 from the north terminates in Gulfport.