As of the 2010 United States Census, there were 22,615 people, 9,091 households, and 6,236 families living in the county. The population density was . There were 9,870 housing units at an average density of . The racial makeup of the county was 96.9% white, 0.6% Asian, 0.2% American Indian, 0.2% black or African American, 1.1% from other races, and 1.0% from two or more races. Those of Hispanic or Latino origin made up 2.2% of the population. In terms of ancestry, 43.3% were German, 11.8% were American, 11.2% were Irish, and 8.6% were English.