Oklahoma City ( ), often shortened to OKC, is the capital and most populous city of the U.S. state of Oklahoma. It is the 20th-most populous U.S. city and 8th largest in the Southern United States with a population of 681,054 at the 2020 census, while the Oklahoma City metropolitan area with an estimated 1.49 million residents is the largest metropolitan area in the state and 42nd-most populous in the nation.
https://en.wikipedia.org/wiki/Oklahoma_City