Oklahoma -- U.S. County in Oklahoma Population (2000): 660448 Housing Units (2000): 295020 Land area (2000): 709.093032 sq. miles (1836.542444 sq. km) Water area (2000): 9.219598 sq. miles (23.878647 sq. km) Total area (2000): 718.312630 sq. miles (1860.421091 sq. km) Located within: Oklahoma (OK), FIPS 40 Location: 35.509671 N, 97.496525 W Headwords: Oklahoma Oklahoma, OK Oklahoma County Oklahoma County, OK