As of the 2010 United States Census, there were 22,330 people, 8,433 households, and 6,390 families living in the county. The population density was . There were 10,425 housing units at an average density of . The racial makeup of the county was 95.6% white, 0.6% Asian, 0.5% black or African American, 0.4% American Indian, 1.6% from other races, and 1.4% from two or more races. Those of Hispanic or Latino origin made up 4.1% of the population. In terms of ancestry, 18.9% were American, 18.8% were Irish, 14.7% were English, and 13.6% were German.