Portland, ND -- U.S. city in North Dakota Population (2000): 604 Housing Units (2000): 286 Land area (2000): 0.860361 sq. miles (2.228325 sq. km) Water area (2000): 0.000000 sq. miles (0.000000 sq. km) Total area (2000): 0.860361 sq. miles (2.228325 sq. km) FIPS code: 63900 Located within: North Dakota (ND), FIPS 38 Location: 47.500451 N, 97.371960 W ZIP Codes (1990): 58274 Note: some ZIP codes may be omitted esp. for suburbs. Headwords: Portland, ND Portland