Dover, NH -- U.S. city in New Hampshire Population (2000): 26884 Housing Units (2000): 11924 Land area (2000): 26.719007 sq. miles (69.201907 sq. km) Water area (2000): 2.335502 sq. miles (6.048921 sq. km) Total area (2000): 29.054509 sq. miles (75.250828 sq. km) FIPS code: 18820 Located within: New Hampshire (NH), FIPS 33 Location: 43.190984 N, 70.878533 W ZIP Codes (1990): Note: some ZIP codes may be omitted esp. for suburbs. Headwords: Dover, NH Dover