Hanson -- U.S. County in South Dakota Population (2000): 3139 Housing Units (2000): 1218 Land area (2000): 434.763730 sq. miles (1126.032844 sq. km) Water area (2000): 0.871702 sq. miles (2.257697 sq. km) Total area (2000): 435.635432 sq. miles (1128.290541 sq. km) Located within: South Dakota (SD), FIPS 46 Location: 43.660626 N, 97.785990 W Headwords: Hanson Hanson, SD Hanson County Hanson County, SD