Johnson -- U.S. County in Kentucky Population (2000): 23445 Housing Units (2000): 10236 Land area (2000): 261.543726 sq. miles (677.395112 sq. km) Water area (2000): 2.398881 sq. miles (6.213074 sq. km) Total area (2000): 263.942607 sq. miles (683.608186 sq. km) Located within: Kentucky (KY), FIPS 21 Location: 37.834162 N, 82.797237 W Headwords: Johnson Johnson, KY Johnson County Johnson County, KY