Dover, DE -- U.S. city in Delaware Population (2000): 32135 Housing Units (2000): 13195 Land area (2000): 22.393837 sq. miles (57.999768 sq. km) Water area (2000): 0.298921 sq. miles (0.774202 sq. km) Total area (2000): 22.692758 sq. miles (58.773970 sq. km) FIPS code: 21200 Located within: Delaware (DE), FIPS 10 Location: 39.161921 N, 75.526755 W ZIP Codes (1990): 19901 Note: some ZIP codes may be omitted esp. for suburbs. Headwords: Dover, DE Dover