As of the 2010 United States Census, there were 37,963 people, 12,917 households, and 9,256 families in the county. The population density was . There were 14,706 housing units at an average density of . The racial makeup of the county was 93.4% white, 4.0% black or African American, 0.7% Asian, 0.3% American Indian, 0.5% from other races, and 1.1% from two or more races. Those of Hispanic or Latino origin made up 1.5% of the population. In terms of ancestry, 23.6% were German, 15.3% were American, 12.7% were Irish, and 12.6% were English.