Hardin -- U.S. County in Kentucky Population (2000): 94174 Housing Units (2000): 37673 Land area (2000): 627.977045 sq. miles (1626.453011 sq. km) Water area (2000): 1.883118 sq. miles (4.877254 sq. km) Total area (2000): 629.860163 sq. miles (1631.330265 sq. km) Located within: Kentucky (KY), FIPS 21 Location: 37.738924 N, 85.914926 W Headwords: Hardin Hardin, KY Hardin County Hardin County, KY