Nashua, IA -- U.S. city in Iowa Population (2000): 1618 Housing Units (2000): 739 Land area (2000): 2.458053 sq. miles (6.366328 sq. km) Water area (2000): 0.171959 sq. miles (0.445371 sq. km) Total area (2000): 2.630012 sq. miles (6.811699 sq. km) FIPS code: 55335 Located within: Iowa (IA), FIPS 19 Location: 42.952231 N, 92.537944 W ZIP Codes (1990): 50658 Note: some ZIP codes may be omitted esp. for suburbs. Headwords: Nashua, IA Nashua