As of the 2010 United States Census, there were 2,966 people, 1,228 households, and 857 families in the county. The population density was . There were 1,387 housing units at an average density of . The racial makeup of the county was 90.0% white, 6.6% American Indian, 0.3% black or African American, 0.1% Asian, 0.2% from other races, and 2.8% from two or more races. Those of Hispanic or Latino origin made up 0.7% of the population. In terms of ancestry, 46.4% were German, 12.5% were Irish, 10.8% were English, 10.7% were Norwegian, 8.4% were Czech, 5.0% were Swedish, and 2.5% were American.