Montgomery -- U.S. County in Mississippi Population (2000): 12189 Housing Units (2000): 5402 Land area (2000): 406.845491 sq. miles (1053.724940 sq. km) Water area (2000): 1.016949 sq. miles (2.633886 sq. km) Total area (2000): 407.862440 sq. miles (1056.358826 sq. km) Located within: Mississippi (MS), FIPS 28 Location: 33.480389 N, 89.651425 W Headwords: Montgomery Montgomery, MS Montgomery County Montgomery County, MS