Ohio -- U.S. County in Kentucky Population (2000): 22916 Housing Units (2000): 9909 Land area (2000): 593.789132 sq. miles (1537.906727 sq. km) Water area (2000): 2.943132 sq. miles (7.622677 sq. km) Total area (2000): 596.732264 sq. miles (1545.529404 sq. km) Located within: Kentucky (KY), FIPS 21 Location: 37.456506 N, 86.879363 W Headwords: Ohio Ohio, KY Ohio County Ohio County, KY