Osceola -- U.S. County in Iowa Population (2000): 7003 Housing Units (2000): 3012 Land area (2000): 398.772730 sq. miles (1032.816585 sq. km) Water area (2000): 0.709207 sq. miles (1.836838 sq. km) Total area (2000): 399.481937 sq. miles (1034.653423 sq. km) Located within: Iowa (IA), FIPS 19 Location: 43.379878 N, 95.633004 W Headwords: Osceola Osceola, IA Osceola County Osceola County, IA