Dumas, MS -- U.S. town in Mississippi Population (2000): 452 Housing Units (2000): 192 Land area (2000): 3.895831 sq. miles (10.090155 sq. km) Water area (2000): 0.000000 sq. miles (0.000000 sq. km) Total area (2000): 3.895831 sq. miles (10.090155 sq. km) FIPS code: 20340 Located within: Mississippi (MS), FIPS 28 Location: 34.634549 N, 88.847800 W ZIP Codes (1990): 38625 Note: some ZIP codes may be omitted esp. for suburbs. Headwords: Dumas, MS Dumas