Mandan, ND -- U.S. city in North Dakota Population (2000): 16718 Housing Units (2000): 6958 Land area (2000): 10.176812 sq. miles (26.357820 sq. km) Water area (2000): 0.108531 sq. miles (0.281094 sq. km) Total area (2000): 10.285343 sq. miles (26.638914 sq. km) FIPS code: 49900 Located within: North Dakota (ND), FIPS 38 Location: 46.828893 N, 100.891138 W ZIP Codes (1990): 58554 Note: some ZIP codes may be omitted esp. for suburbs. Headwords: Mandan, ND Mandan