Tulsa ( TUL-sə) is the second-most-populous city in the U.S. state of Oklahoma and the 48th-most populous city in the United States. The population was 413,066 as of the 2020 census. It is the principal municipality of the Tulsa metropolitan area, a region with 1.06 million residents. The city serves as the county seat of Tulsa County, the most...