Oklahoma City is the capital and the largest city in the US state of Oklahoma. The county seat of Oklahoma County, the city ranks 31st among United States cities in population. The city's population, from the 2010 census, was 579,999, with a metro-area population of 1,252,987 . In 2010, the Oklahoma City-Shawnee Combined Statistical Area had a population of 1,322,249 residents. Oklahoma City's city limits extend into Canadian, Cleveland, and Pottawatomie counties, though much of those areas outside of the core Oklahoma County area are suburban or rural . The city ranks as the eighth-largest... city in the United States by land area . Oklahoma City features one of the largest livestock markets in the world. Oil, natural gas, petroleum products and related industries are the largest sector of the local economy. The city is situated in the middle of an active oil field and oil derricks dot the capitol grounds.
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| County: | Canadian County, Pottawatomie County, Cleveland County, Oklahoma County |
| State: | Oklahoma |
| Country: | United States of America |
| Population: | 579,999 |
| Area: | 621.2 sq. mi. |
| Time zone: | Central Time zone |
| Also known as: | Oklahoma City, Oklahoma, Pottawatomie County / Oklahoma City city |