Fort Atkinson, IA -- U.S. city in Iowa Population (2000): 389 Housing Units (2000): 169 Land area (2000): 0.313471 sq. miles (0.811885 sq. km) Water area (2000): 0.000000 sq. miles (0.000000 sq. km) Total area (2000): 0.313471 sq. miles (0.811885 sq. km) FIPS code: 28425 Located within: Iowa (IA), FIPS 19 Location: 43.144034 N, 91.934839 W ZIP Codes (1990): 52144 Note: some ZIP codes may be omitted esp. for suburbs. Headwords: Fort Atkinson, IA Fort Atkinson