Rocklake, ND -- U.S. city in North Dakota Population (2000): 194 Housing Units (2000): 116 Land area (2000): 0.216174 sq. miles (0.559888 sq. km) Water area (2000): 0.000000 sq. miles (0.000000 sq. km) Total area (2000): 0.216174 sq. miles (0.559888 sq. km) FIPS code: 67500 Located within: North Dakota (ND), FIPS 38 Location: 48.789589 N, 99.246986 W ZIP Codes (1990): 58365 Note: some ZIP codes may be omitted esp. for suburbs. Headwords: Rocklake, ND Rocklake