As of the 2010 United States Census, there were 37,782 people, 16,157 households, and 10,699 families residing in the county. The population density was . There were 19,577 housing units at an average density of . The racial makeup of the county was 81.4% white, 12.8% black or African American, 1.2% Asian, 0.2% American Indian, 0.1% Pacific islander, 2.7% from other races, and 1.6% from two or more races. Those of Hispanic or Latino origin made up 5.5% of the population. In terms of ancestry, 21.7% were German, 18.8% were English, 18.2% were Irish, and 8.6% were American.