Portal, ND -- U.S. city in North Dakota Population (2000): 131 Housing Units (2000): 98 Land area (2000): 0.562735 sq. miles (1.457478 sq. km) Water area (2000): 0.000000 sq. miles (0.000000 sq. km) Total area (2000): 0.562735 sq. miles (1.457478 sq. km) FIPS code: 63740 Located within: North Dakota (ND), FIPS 38 Location: 48.995629 N, 102.550430 W ZIP Codes (1990): 58772 Note: some ZIP codes may be omitted esp. for suburbs. Headwords: Portal, ND Portal