Madison, SD -- U.S. city in South Dakota Population (2000): 6540 Housing Units (2000): 2706 Land area (2000): 4.276099 sq. miles (11.075044 sq. km) Water area (2000): 0.000000 sq. miles (0.000000 sq. km) Total area (2000): 4.276099 sq. miles (11.075044 sq. km) FIPS code: 40220 Located within: South Dakota (SD), FIPS 46 Location: 44.007734 N, 97.114738 W ZIP Codes (1990): 57042 Note: some ZIP codes may be omitted esp. for suburbs. Headwords: Madison, SD Madison