As of the 2010 census, there were 11,451 people, 4,955 households, and 3,008 families in the county. The population density was 9.65/sqmi (3.72/km2). There were 5,615 housing units at an average density of 4.73/sqmi (1.83/km2). The racial makeup of the county was 87.7% white, 8.7% American Indian, 0.4% black or African American, 0.4% Asian, 0.2% from other races, and 2.6% from two or more races. Those of Hispanic or Latino origin made up 1.2% of the population. In terms of ancestry, 41.9% were German, 37.7% were Norwegian, 7.0% were Irish, 5.7% were Swedish, 5.2% were English, and 2.9% were American.