Grinnell, IA -- U.S. city in Iowa Population (2000): 9105 Housing Units (2000): 3725 Land area (2000): 4.987236 sq. miles (12.916882 sq. km) Water area (2000): 0.036313 sq. miles (0.094051 sq. km) Total area (2000): 5.023549 sq. miles (13.010933 sq. km) FIPS code: 33105 Located within: Iowa (IA), FIPS 19 Location: 41.743750 N, 92.724742 W ZIP Codes (1990): 50112 Note: some ZIP codes may be omitted esp. for suburbs. Headwords: Grinnell, IA Grinnell