Wallingford, IA -- U.S. city in Iowa Population (2000): 210 Housing Units (2000): 88 Land area (2000): 0.974873 sq. miles (2.524909 sq. km) Water area (2000): 0.000000 sq. miles (0.000000 sq. km) Total area (2000): 0.974873 sq. miles (2.524909 sq. km) FIPS code: 81975 Located within: Iowa (IA), FIPS 19 Location: 43.319163 N, 94.793331 W ZIP Codes (1990): 51365 Note: some ZIP codes may be omitted esp. for suburbs. Headwords: Wallingford, IA Wallingford