As of the 2010 United States Census, there were 82,839 people, 30,682 households, and 20,836 families in the county. The population density was . There were 33,191 housing units at an average density of . The racial makeup of the county was 89.8% white, 3.2% American Indian, 1.3% Asian, 0.8% black or African American, 0.2% Pacific Islander, 2.1% from other races, and 2.7% from two or more races. Those of Hispanic or Latino origin made up 6.7% of the population. In terms of ancestry, 23.4% were English, 16.9% were German, 9.3% were Irish, and 7.0% were American.
