As of the 2010 United States Census, there were 23,770 people, 9,557 households, and 6,698 families living in the county. The population density was . There were 11,191 housing units at an average density of . The racial makeup of the county was 97.4% white, 0.9% black or African American, 0.2% Asian, 0.2% American Indian, 0.1% from other races, and 1.2% from two or more races. Those of Hispanic or Latino origin made up 0.5% of the population. In terms of ancestry, 25.1% were German, 14.3% were Irish, 13.9% were American, and 9.6% were English.