Niagara, ND -- U.S. city in North Dakota Population (2000): 57 Housing Units (2000): 35 Land area (2000): 0.931686 sq. miles (2.413055 sq. km) Water area (2000): 0.026700 sq. miles (0.069152 sq. km) Total area (2000): 0.958386 sq. miles (2.482207 sq. km) FIPS code: 56780 Located within: North Dakota (ND), FIPS 38 Location: 47.997001 N, 97.869353 W ZIP Codes (1990): 58266 Note: some ZIP codes may be omitted esp. for suburbs. Headwords: Niagara, ND Niagara