As of the 2010 United States Census, there were 15,429 people, 6,362 households, and 4,242 families residing in the county. The population density was . There were 7,113 housing units at an average density of . The racial makeup of the county was 91.0% white, 5.9% black or African American, 0.4% American Indian, 0.3% Asian, 0.5% from other races, and 2.0% from two or more races. Those of Hispanic or Latino origin made up 1.9% of the population. In terms of ancestry, 25.7% were German, 16.1% were Irish, 8.5% were English, and 8.5% were American.