Natchez, MS -- U.S. city in Mississippi Population (2000): 18464 Housing Units (2000): 8479 Land area (2000): 13.204609 sq. miles (34.199778 sq. km) Water area (2000): 0.644693 sq. miles (1.669748 sq. km) Total area (2000): 13.849302 sq. miles (35.869526 sq. km) FIPS code: 50440 Located within: Mississippi (MS), FIPS 28 Location: 31.554393 N, 91.387566 W ZIP Codes (1990): 39120 Note: some ZIP codes may be omitted esp. for suburbs. Headwords: Natchez, MS Natchez