Benton -- U.S. County in Oregon Population (2000): 78153 Housing Units (2000): 31980 Land area (2000): 676.461301 sq. miles (1752.026651 sq. km) Water area (2000): 2.509422 sq. miles (6.499374 sq. km) Total area (2000): 678.970723 sq. miles (1758.526025 sq. km) Located within: Oregon (OR), FIPS 41 Location: 44.547364 N, 123.330289 W Headwords: Benton Benton, OR Benton County Benton County, OR