Tulsa County is included in the Tulsa Metropolitan Statistical Area. Before statehood, the area was part of both the Creek Nation and the Cooweescoowee District of Cherokee Nation in Indian Territory. Founded at statehood, in 1907, it was named after the previously established city of Tulsa. Its county seat and largest city is Tulsa, the second-largest city in the state.
As of the 2010 census, the population was 603,403, making it the second-most populous county in Oklahoma, behind only Oklahoma County. Some of the cities, towns, and places in Tulsa County are Berryhill, Bixby, Broken Arrow, Carbondale, Collinsville, Dawson, Garnett, Glenpool, Jenks, Keystone Lake, Keystone, Oklahoma, Lake, Leonard, Liberty, Lotsee, Mingo, North Tulsa, Oakhurst, Owasso, Prattville, Red Fork, Sand Springs, Sapulpa, Skiatook, South Haven, Sperry, Tulsa, Turley
