As of the 2010 United States Census, there were 157,733 people, 64,090 households, and 43,062 families living in the county. The population density was . There were 80,139 housing units at an average density of . The racial makeup of the county was 92.2% white, 0.9% Asian, 0.9% American Indian, 0.4% black or African American, 0.1% Pacific islander, 3.0% from other races, and 2.5% from two or more races. Those of Hispanic or Latino origin made up 7.4% of the population. In terms of ancestry, 24.0% were German, 15.3% were Irish, 14.5% were English, and 4.8% were American.