Keller is a city in Tarrant County, Texas, United States, in the Dallas–Fort Worth metroplex. According to the 2020 census, the city's population is 45,776, making Keller the 78th most populated city in Texas. The most recent population estimate, as of July 1, 2021, is 45,397.

In the early 1850s, settlers established Keller and the town became a stop on the Texas and Pacific Railway. The settlers settled around the wooded region in Keller because of Keller's proximity to the Trinity River water supply and abundant farmland. On November 16, 1955, Keller became incorporated.

Keller is mostly residential, featuring more than 300 acres (120 ha) of developed land for 11 park sites and more than 26 miles of hiking and biking trails.

Keller is in the western fringe of the Eastern Cross Timbers in northeast Tarrant County, part of the frontier of the Peters Colony settlers of the 1840s. In the mid-1840s, the area was first settled by a group of families from Missouri that homesteaded near the head-waters of Big Bear Creek. Mount Gilead Baptist Church was established on July 13, 1850. In 1859, the little log church was burned in an Indian raid. It served as the only schoolhouse in that part of the county until about 1910.

The area became known as 'Double Springs' for the two large springs approximately .mw-parser-output .frac{white-space:nowrap}.mw-parser-output .frac .num,.mw-parser-output .frac .den{font-size:80%;line-height:0;vertical-align:super}.mw-parser-output .frac .den{vertical-align:sub}.mw-parser-output .sr-only{border:0;clip:rect(0,0,0,0);clip-path:polygon(0px 0px,0px 0px,0px 0px);height:1px;margin:-1px;overflow:hidden;padding:0;position:absolute;width:1px}1⁄2 mile north of Mt. Gilead Baptist Church. In the early 1870s, the Double Springs area had a cotton gin, a grist mill, a blacksmith shop and several stores. In 1896, an artesian well was drilled in Keller; the Double Springs filled with silt over time and eventually were plugged and lost until rediscovery in 1984. Today Samantha Springs produces more than 200,000 gallons of water per day.

The Texas and Pacific Railway between Fort Worth and Texarkana was completed in June 1881, and the first train ran on this track on May 9, 1881, which ran parallel with parts of the old Chisholm cattle drive trail. With the advent of rail service, new villages were established all along the line. The Keller of today was one of them. On July 19, 1881, H.W. Black, a druggist of Tarrant County, set aside 40 acres (0.16 km2) out of the north end of the 62 acres (0.25 km2) deeded to him by A.C. Roberts (being a part of the Samuel Needham Survey) for a town site to be known as Athol, situated 14 miles (23 km) northeast of Fort Worth. The land was dedicated to the public for streets and alleyways, but title to the remainder of the 62 acres (0.25 km2) was held by Mr. Black. Settlers migrated to the new village, and before a year had passed the name of the town was changed from Athol to Keller, honoring John C. Keller, a foreman on the railroad. Streets were named and those in the original 40-acre (0.16 km2) site still carry the names given to them in 1881. Streets going north and south are Lamar, Main and Elm; those running east and west are Price, Taylor, Hill, Vine, Bates, Olive and Pecan.

New residential development is gradually filling in open spaces, with neighboring towns affording no opportunity to expand its boundaries. The 1980 Census calculated Keller's population at 4,555; today, nearly 45,000 residents call Keller home. City facilities include Keller Town Hall on Bear Creek Parkway, the Keller Public Library and Keller Senior Activities Center on Johnson Road, the Municipal Service Center on Bear Creek Pkwy. West, and the city's recreation and aquatic center known as The Keller Pointe on Rufe Snow Drive. The city also recently renovated and expanded its police facility, which houses the Regional Jail, Regional Animal Adoption Center and regional 911 dispatch center, NETCOM, serving the cities of Keller, Colleyville, Southlake and Westlake.

The Keller Independent School District serves portions of the cities of Colleyville, Fort Worth, Haltom City, Hurst, North Richland Hills, Southlake, Watauga, and Westlake, as well as the entire city of Keller. Its 51 square miles (130 km2) encompass the third-largest land area in Tarrant County. Enrollment in the school district has doubled during the past 10 years and is expected to do the same during the next decade, making it the ninth fastest-growing school district in Texas.[citation needed] The U.S. Census Bureau's American Community Survey listed Keller as one of the "Nation's Richest Cities" with a population over 20,000 in 2021, ranked number 45 with median household income of $141,364. Neighboring Southlake was ranked number 1.

According to the United States Census Bureau, the city has a total area of 18.4 square miles (47.8 km2). Keller is east of Interstate 35W, south of Highway 114 and Alliance Gate Freeway.

Here is the list of cities surrounding The City of Keller, whom which are located in either Denton or Tarrant County.

Fort Worth, Southlake, Roanoke

The climate in this area is characterized by hot, humid summers and generally mild to cool winters. According to the Köppen Climate Classification system, Keller has a humid subtropical climate, abbreviated "Cfa" on climate maps.

As of the 2020 United States census, there were 45,776 people, 16,383 households, and 13,148 families residing in the city.

The City of Keller is a full-service city, providing police, fire and emergency services, parks and recreation, library, senior center, animal control, planning, building inspection, economic development, public works, street maintenance, water, wastewater, drainage, and solid waste disposal. Organized under the Council-Manager form of government, the Keller city council has seven representatives elected at-large and responsible for enacting local legislation, setting policies and adopting Keller's annual operating budgets. Keller City Hall is located at 1100 Bear Creek Parkway in Keller Town Center. The current mayor of Keller is Armin Mizani, the city's first mayor of Iranian and Cuban descent, and the city manager is Mark Hafner.

The Keller Police Department serves the City of Keller and the Town of Westlake. The police department shares a 9-1-1 dispatch center, regional jail, regional animal services and adoption center with neighboring cities of Southlake, Colleyville and Westlake. The Keller Police Department also provides all law enforcement services for the Town of Westlake. The department consists of a five service divisions: patrol, traffic, investigations, confinement and administrative.

Keller Fire Rescue maintains three fire stations throughout the city. Firefighters and paramedics provide full-time services for Keller residents and, through mutual aid, neighboring cities. The fire department, like the police department, participates in a shared communications network with Southlake, Colleyville and Westlake. (Unlike the police department, Keller Fire-Rescue does not serve Westlake as they maintain their own fire department.)

The City of Keller is a voluntary member of the North Central Texas Council of Governments association. The member's purpose is to coordinate individual and collective local governments, assist regional solutions, eliminate unnecessary duplication, and enable joint decisions.

The city prides itself as "Texas's Most Family Friendly City."

Republican Representative Giovanni Capriglione of District 98 and Republican Senator Kelly Hancock of District 9 represents Keller citizens in the Texas House of Representatives and in the Texas State Senate.

Republican Senators John Cornyn and Ted Cruz represents Texas in the United States Senate. In the United States House of Representatives, Republican Representative Beth Van Duyne represents the 24th Congressional District of Texas.

The Keller Independent School District has 39 campuses serving more than 34,000 students. Students zoned to Keller ISD attend 23 different elementary schools, 12 different intermediate/middle schools, and 5 different high schools. Most of the schools within the district are located in northeast Fort Worth. This means Keller's school district is substantially larger than the city itself.

One source of Keller's bedroom-community serenity comes from having no contact with any interstate highways. U.S. Route 377, a north–south United States highway runs along Keller's western border, parallel to Interstate 35W. Davis Boulevard (FM1938), a north–south Farm to Market Road from North Richland Hills to Southlake, runs through Keller. Keller Parkway (FM 1709) runs from Interstate 35W in Fort Worth, where it is named "Golden Triangle Boulevard," to State Highway 114 (SH 114) in Southlake, where it is named "Southlake Boulevard."

In September 2004, Verizon Communications, launched their FiOS fiber-optic communications network; 9,000 customers in Keller, Texas, were the very first in the nation. Verizon replaced copper wires with optical fibers, commencing service in 2005.