Klamath -- U.S. County in Oregon Population (2000): 63775 Housing Units (2000): 28883 Land area (2000): 5944.186082 sq. miles (15395.370621 sq. km) Water area (2000): 191.560791 sq. miles (496.140150 sq. km) Total area (2000): 6135.746873 sq. miles (15891.510771 sq. km) Located within: Oregon (OR), FIPS 41 Location: 42.662031 N, 121.651634 W Headwords: Klamath Klamath, OR Klamath County Klamath County, OR