As of the 2010 United States Census, there were 34,200 people, 14,932 households, and 8,651 families living in the county. The population density was . There were 16,717 housing units at an average density of . The racial makeup of the county was 94.4% white, 1.9% American Indian, 0.5% Asian, 0.3% black or African American, 0.1% Pacific islander, 0.7% from other races, and 2.1% from two or more races. Those of Hispanic or Latino origin made up 3.7% of the population. In terms of ancestry, 32.6% were Irish, 23.3% were German, 16.1% were English, 8.3% were Italian, 6.9% were Norwegian, and 3.2% were American.