 Bethlehem Steel, once one of the world's largest manufacturers of steel, was located in this county prior to its closing in 2003.According to the U.S. Census Bureau, the county has a total area of , of which is land and (2.0%) is water.The climate is humid continental (mostly "Dfa" with a little "Dfb" in higher northern areas) and the hardiness zones are 6b and 6a.