As of the 2010 United States Census, there were 22,678 people, 9,753 households, and 6,514 families residing in the county. The population density was . There were 13,574 housing units at an average density of . The racial makeup of the county was 97.2% white, 0.5% black or African American, 0.3% Asian, 0.2% American Indian, 0.9% from other races, and 0.9% from two or more races. Those of Hispanic or Latino origin made up 2.7% of the population. In terms of ancestry, 49.4% were German, 19.7% were Irish, 11.1% were English, and 8.5% were American.