Hamburg, IA -- U.S. city in Iowa Population (2000): 1240 Housing Units (2000): 604 Land area (2000): 1.120030 sq. miles (2.900865 sq. km) Water area (2000): 0.000472 sq. miles (0.001223 sq. km) Total area (2000): 1.120502 sq. miles (2.902088 sq. km) FIPS code: 33780 Located within: Iowa (IA), FIPS 19 Location: 40.605816 N, 95.655023 W ZIP Codes (1990): 51640 Note: some ZIP codes may be omitted esp. for suburbs. Headwords: Hamburg, IA Hamburg