Yamhill -- U.S. County in Oregon Population (2000): 84992 Housing Units (2000): 30270 Land area (2000): 715.564599 sq. miles (1853.303724 sq. km) Water area (2000): 2.794202 sq. miles (7.236949 sq. km) Total area (2000): 718.358801 sq. miles (1860.540673 sq. km) Located within: Oregon (OR), FIPS 41 Location: 45.230090 N, 123.223134 W Headwords: Yamhill Yamhill, OR Yamhill County Yamhill County, OR