Gilbert, IA -- U.S. city in Iowa Population (2000): 987 Housing Units (2000): 347 Land area (2000): 0.825520 sq. miles (2.138087 sq. km) Water area (2000): 0.000000 sq. miles (0.000000 sq. km) Total area (2000): 0.825520 sq. miles (2.138087 sq. km) FIPS code: 30630 Located within: Iowa (IA), FIPS 19 Location: 42.105858 N, 93.645185 W ZIP Codes (1990): Note: some ZIP codes may be omitted esp. for suburbs. Headwords: Gilbert, IA Gilbert