Monument, OR -- U.S. city in Oregon Population (2000): 151 Housing Units (2000): 81 Land area (2000): 0.537367 sq. miles (1.391775 sq. km) Water area (2000): 0.000000 sq. miles (0.000000 sq. km) Total area (2000): 0.537367 sq. miles (1.391775 sq. km) FIPS code: 49750 Located within: Oregon (OR), FIPS 41 Location: 44.819870 N, 119.420866 W ZIP Codes (1990): 97864 Note: some ZIP codes may be omitted esp. for suburbs. Headwords: Monument, OR Monument