La Plata, MD -- U.S. town in Maryland Population (2000): 6551 Housing Units (2000): 2308 Land area (2000): 6.949048 sq. miles (17.997950 sq. km) Water area (2000): 0.000000 sq. miles (0.000000 sq. km) Total area (2000): 6.949048 sq. miles (17.997950 sq. km) FIPS code: 45750 Located within: Maryland (MD), FIPS 24 Location: 38.534258 N, 76.973377 W ZIP Codes (1990): 20646 Note: some ZIP codes may be omitted esp. for suburbs. Headwords: La Plata, MD La Plata