Little Sioux, IA -- U.S. city in Iowa Population (2000): 217 Housing Units (2000): 111 Land area (2000): 0.349912 sq. miles (0.906268 sq. km) Water area (2000): 0.000000 sq. miles (0.000000 sq. km) Total area (2000): 0.349912 sq. miles (0.906268 sq. km) FIPS code: 45840 Located within: Iowa (IA), FIPS 19 Location: 41.809169 N, 96.022556 W ZIP Codes (1990): 51545 Note: some ZIP codes may be omitted esp. for suburbs. Headwords: Little Sioux, IA Little Sioux