Chickasaw -- U.S. County in Mississippi Population (2000): 19440 Housing Units (2000): 7981 Land area (2000): 501.557583 sq. miles (1299.028121 sq. km) Water area (2000): 2.707568 sq. miles (7.012569 sq. km) Total area (2000): 504.265151 sq. miles (1306.040690 sq. km) Located within: Mississippi (MS), FIPS 28 Location: 33.934340 N, 88.937882 W Headwords: Chickasaw Chickasaw, MS Chickasaw County Chickasaw County, MS