As of the 2010 United States Census, there were 23,964 people, 9,595 households, and 6,606 families residing in the county. The population density was . There were 13,688 housing units at an average density of . The racial makeup of the county was 97.2% white, 1.0% black or African American, 0.2% Asian, 0.2% American Indian, 0.1% Pacific islander, 0.2% from other races, and 1.1% from two or more races. Those of Hispanic or Latino origin made up 1.0% of the population. In terms of ancestry, 29.0% were German, 12.9% were American, 11.9% were Irish, and 8.0% were English.