As of the 2010 United States Census, there were 5,324 people, 2,015 households, and 1,246 families in the county. The population density was . There were 2,336 housing units at an average density of . The racial makeup of the county was 92.0% white, 4.5% American Indian, 0.5% black or African American, 0.4% Asian, 0.6% from other races, and 1.9% from two or more races. Those of Hispanic or Latino origin made up 2.4% of the population. In terms of ancestry, 30.8% were German, 17.7% were Irish, 15.8% were English, 10.5% were Norwegian, and 3.6% were American.