Beaver -- U.S. County in Pennsylvania Population (2000): 181412 Housing Units (2000): 77765 Land area (2000): 434.213128 sq. miles (1124.606790 sq. km) Water area (2000): 9.690931 sq. miles (25.099394 sq. km) Total area (2000): 443.904059 sq. miles (1149.706184 sq. km) Located within: Pennsylvania (PA), FIPS 42 Location: 40.695415 N, 80.312675 W Headwords: Beaver Beaver, PA Beaver County Beaver County, PA