Oklahoma County is located in the central part of the U.S. state of Oklahoma. As of the 2020 census, the population was 796,292,^[1] making it the most populous county in Oklahoma. The county seat is Oklahoma City,^[2] the state capital and largest city. Oklahoma County is at the heart of the Oklahoma City metropolitan statistical area.

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Oklahoma County
County
Oklahoma County Courthouse
Seal
Location within the U.S. state of Oklahoma
Oklahoma's location within the U.S.
Coordinates: 35°29′N 97°32′W
Country	United States
State	Oklahoma
Founded	1890
Seat	Oklahoma City
Largest city	Oklahoma City
Area
• Total	718 sq mi (1,860 km2)
• Land	708.82 sq mi (1,835.8 km2)
• Water	9.6 sq mi (25 km2)  1.3%
Population  (2020)
• Total	796,292
• Density	1,123/sq mi (434/km2)
Time zone	UTC−6 (Central)
• Summer (DST)	UTC−5 (CDT)
Congressional districts	3rd, 4th, 5th
Website	www.oklahomacounty.org

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Oklahoma County is one of seven counties in the United States to share the same name as the state it is located in (the other six being Arkansas County, Hawaii County, Idaho County, Iowa County, New York County (Manhattan), and Utah County), and the only one of the seven to contain the state capital, and one of two to contain a city of the same name as well.^[3]

The area that would someday be called Oklahoma County was originally inhabited by members of the indigenous nations of the Southern Plains, but by the 1830s the land would become part of the territory assigned to the Seminoles and Creeks after their removal from their ancestral lands in the Southeastern USA.^[4]

As a result of the Reconstruction era treaties signed between the US government and the Seminole and Creek nations in 1866, the land was taken from tribal jurisdiction but not assigned to other tribal governments, which in time led it to be called the Unassigned Lands. In 1889, the US federal government held a land run for the Unassigned lands, which led to the rapid settlement of the area.^[5]

By 1890, Oklahoma County was called "County Two" and was one of seven counties established by the Organic Act of 1890.^[4]

County business initially took place in a building at the intersection of California Avenue and Robinson Street until the construction of the first Oklahoma County Courthouse at 520 West Main Street in the 1900s. In 1937, the county government was moved to a building at 321 Park Avenue, which now serves only as the county courthouse.^[6]

According to the U.S. Census Bureau, the county has a total area of 718 square miles (1,860 km²), of which 709 square miles (1,840 km²) is land and 9.6 square miles (25 km²) (1.3%) is water.^[7]

According to the 2010 U.S. census, there were 718,633 people, 277,615 households, and 172,572 families residing in the county. The population density was 1,013 inhabitants per square mile (391/km²). There were 319,828 housing units at an average density of 416 units per square mile (161 units/km²). The racial makeup of the county was 64.6% White, 15.4% Black or African American, 3.5% Native American, 3% Asian, 0.1% Pacific Islander, 8.1% from other races, and 5.3% from two or more races; 15.1% of the population were Hispanic or Latino of any race.^[14] Throughout its population, 12.4% were of German, 12.3% Mexican, 10.1% Irish, 7.9% English, and 7.7% American ancestries according to the 2010 census. 84.4% spoke English and 11.5% Spanish as their first language.^[15]

At the 2020 U.S. census, its population increased to 796,292, with a 2022-estimate at 802,559. Racially, the 2021 American Community Survey estimated 54.5% were non-Hispanic white, 15.8% Black or African American, 4.7% Asian, 0.1% Pacific Islander, 5.8% multiracial, and 18.5% Hispanic or Latino of any race. An estimated 10.2% of its population between 2017 and 2021 were foreign-born residents.^[16]

In 2010, there were 277,615 households, out of which 28.5% had children under the age of 18 living with them, 43.1% were married couples living together, 15.4% had a female householder with no husband present, and 37.8% were non-families. 31.9% of all households were made up of individuals, and 9.7% had someone living alone who was 65 years of age or older. The average household size was 2.56 and the average family size was 3.26. As of 2021,^[16] there were 313,822 households with an average of 2.48 people per household. The median value of an owner-occupied housing unit was $164,000 from 2017 to 2021, and the median gross rent was $929.

In 2010, the median income for a household in the county was $42,916, and the median income for a family was $54,721. The per capita income for the county was $25,723. About 11.70% of families and 15.30% of the population were below the poverty line, including 21.70% of those under age 18 and 8.60% of those age 65 or over.^[17] In 2021, its median household income was $58,239 with a per capita income of $34,129. Approximately 16.3% of the population lived at or below the poverty line.^[16]

Since the second half of the 20th century, Oklahoma County has been quite conservative for an urban county. It swung from a 20-point victory for Harry Truman in 1948 to a 15-point victory for Dwight Eisenhower in 1952. It has gone Republican in all but one presidential election since then; it narrowly voted for Lyndon Johnson in 1964. This mirrors the growing Republican trend in Oklahoma since the end of World War II. It was one of the few areas in the South where Jimmy Carter didn't do well.

However, the Republican share of votes for president has decreased in every election since the 2004 election. In the 2022 Oklahoma gubernatorial election, Democratic candidate Joy Hofmeister received her largest vote share of any county, with 55.0% of the vote and a modest improvement over the 2018 Democratic candidate, Drew Edmonson.^[18] Incumbent Republican Governor Mary Fallin was the last member of her party to win the county with 51.3% in 2014.^[19] Also, in the 2018 United States House of Representatives elections in Oklahoma, Democrat Kendra Horn received 52.3% of the vote in Oklahoma County, which was the only county in the state to vote for a Democratic House candidate, thereby changing parties.^[20] Horn would carry the county again in her 2022 Senate run, becoming the first Democratic Senatorial candidate to carry the county since David Boren's 1990 landslide.^[21][22] In the 2020 United States Presidential election, Republican Donald Trump narrowly carried the county (1% margin), down from 10 points in 2016. It was also the best showing for a Democrat in the county since LBJ.

School districts include:^[25]

K-12:

• Bethany Public Schools
• Choctaw/Nicoma Park Schools
• Crooked Oak Public Schools
• Deer Creek Public Schools
• Edmond Public Schools
• Harrah Public Schools
• Jones Public Schools
• Luther Public Schools
• McLoud Public Schools
• Midwest City-Del City Schools
• Millwood Public Schools
• Moore Public Schools
• Mustang Public Schools
• Oklahoma City Public Schools
• Piedmont Public Schools
• Putnam City Public Schools
• Western Heights Public Schools

Elementary only:

• Crutcho Public School
• Oakdale Public School

• List of counties in Oklahoma
• National Register of Historic Places listings in Oklahoma County, Oklahoma