Greene -- U.S. County in Pennsylvania Population (2000): 40672 Housing Units (2000): 16678 Land area (2000): 575.860595 sq. miles (1491.472030 sq. km) Water area (2000): 2.087812 sq. miles (5.407409 sq. km) Total area (2000): 577.948407 sq. miles (1496.879439 sq. km) Located within: Pennsylvania (PA), FIPS 42 Location: 39.858771 N, 80.162323 W Headwords: Greene Greene, PA Greene County Greene County, PA