Gresham, OR -- U.S. city in Oregon Population (2000): 90205 Housing Units (2000): 35309 Land area (2000): 22.154663 sq. miles (57.380311 sq. km) Water area (2000): 0.094455 sq. miles (0.244638 sq. km) Total area (2000): 22.249118 sq. miles (57.624949 sq. km) FIPS code: 31250 Located within: Oregon (OR), FIPS 41 Location: 45.503692 N, 122.439425 W ZIP Codes (1990): 97030 97080 Note: some ZIP codes may be omitted esp. for suburbs. Headwords: Gresham, OR Gresham