Ralston, IA -- U.S. city in Iowa Population (2000): 98 Housing Units (2000): 47 Land area (2000): 1.976464 sq. miles (5.119018 sq. km) Water area (2000): 0.000000 sq. miles (0.000000 sq. km) Total area (2000): 1.976464 sq. miles (5.119018 sq. km) FIPS code: 65505 Located within: Iowa (IA), FIPS 19 Location: 42.041801 N, 94.630538 W ZIP Codes (1990): 51459 Note: some ZIP codes may be omitted esp. for suburbs. Headwords: Ralston, IA Ralston