As of the 2010 United States Census, there were 10,570 people, 4,422 households, and 3,059 families residing in the county. The population density was . There were 5,776 housing units at an average density of . The racial makeup of the county was 95.0% white, 1.6% American Indian, 0.4% Asian, 0.3% black or African American, 0.5% from other races, and 2.2% from two or more races. Those of Hispanic or Latino origin made up 2.3% of the population. In terms of ancestry, 42.3% were German, 14.6% were Irish, 13.9% were English, 5.5% were Norwegian, 5.3% were Scotch-Irish, and 3.6% were American.