 According to the U.S. Census Bureau, the county has a total area of , of which is land and (0.3%) is water.As of the 2010 census, there were 42,090 people living in the county.The racial makeup of the county was 95.4% White, 0.6% Black, 0.5% Native American, 0.3% Asian, <0.1% Pacific Islander, <0.1% from some other race and 1.1% from two or more races.