Grand Junction, IA -- U.S. city in Iowa Population (2000): 964 Housing Units (2000): 407 Land area (2000): 0.964878 sq. miles (2.499023 sq. km) Water area (2000): 0.000000 sq. miles (0.000000 sq. km) Total area (2000): 0.964878 sq. miles (2.499023 sq. km) FIPS code: 31980 Located within: Iowa (IA), FIPS 19 Location: 42.031161 N, 94.235377 W ZIP Codes (1990): 50107 Note: some ZIP codes may be omitted esp. for suburbs. Headwords: Grand Junction, IA Grand Junction