Dixon, IA -- U.S. city in Iowa Population (2000): 276 Housing Units (2000): 108 Land area (2000): 0.146672 sq. miles (0.379880 sq. km) Water area (2000): 0.000000 sq. miles (0.000000 sq. km) Total area (2000): 0.146672 sq. miles (0.379880 sq. km) FIPS code: 21540 Located within: Iowa (IA), FIPS 19 Location: 41.741464 N, 90.782891 W ZIP Codes (1990): Note: some ZIP codes may be omitted esp. for suburbs. Headwords: Dixon, IA Dixon