Harding -- U.S. County in South Dakota Population (2000): 1353 Housing Units (2000): 804 Land area (2000): 2670.498207 sq. miles (6916.558309 sq. km) Water area (2000): 7.078954 sq. miles (18.334405 sq. km) Total area (2000): 2677.577161 sq. miles (6934.892714 sq. km) Located within: South Dakota (SD), FIPS 46 Location: 45.615007 N, 103.514871 W Headwords: Harding Harding, SD Harding County Harding County, SD