Keswick, IA -- U.S. city in Iowa Population (2000): 295 Housing Units (2000): 121 Land area (2000): 0.437529 sq. miles (1.133195 sq. km) Water area (2000): 0.000000 sq. miles (0.000000 sq. km) Total area (2000): 0.437529 sq. miles (1.133195 sq. km) FIPS code: 41070 Located within: Iowa (IA), FIPS 19 Location: 41.453941 N, 92.238818 W ZIP Codes (1990): 50136 Note: some ZIP codes may be omitted esp. for suburbs. Headwords: Keswick, IA Keswick