As of the 2010 United States Census, there were 38,950 people, 14,613 households, and 9,741 families residing in the county. The population density was . There were 15,895 housing units at an average density of . The racial makeup of the county was 91.8% white, 4.9% black or African American, 0.5% Asian, 0.2% American Indian, 1.3% from other races, and 1.3% from two or more races. Those of Hispanic or Latino origin made up 3.9% of the population. In terms of ancestry, 36.6% were German, 17.2% were Irish, 11.2% were American, 10.7% were English, and 5.1% were Italian.