Union -- U.S. County in Oregon Population (2000): 24530 Housing Units (2000): 10603 Land area (2000): 2036.554493 sq. miles (5274.651697 sq. km) Water area (2000): 1.997315 sq. miles (5.173023 sq. km) Total area (2000): 2038.551808 sq. miles (5279.824720 sq. km) Located within: Oregon (OR), FIPS 41 Location: 45.325011 N, 118.031311 W Headwords: Union Union, OR Union County Union County, OR