Jefferson -- U.S. County in Oklahoma Population (2000): 6818 Housing Units (2000): 3373 Land area (2000): 758.753843 sq. miles (1965.163349 sq. km) Water area (2000): 15.072569 sq. miles (39.037772 sq. km) Total area (2000): 773.826412 sq. miles (2004.201121 sq. km) Located within: Oklahoma (OK), FIPS 40 Location: 34.134024 N, 97.876981 W Headwords: Jefferson Jefferson, OK Jefferson County Jefferson County, OK