As of the 2010 United States Census, there were 9,612 people, 2,780 households, and 2,091 families in the county. The population density was . There were 3,142 housing units at an average density of . The racial makeup of the county was 88.1% American Indian, 9.6% white, 0.2% black or African American, 0.2% Asian, 0.2% from other races, and 1.8% from two or more races. Those of Hispanic or Latino origin made up 2.4% of the population. In terms of ancestry, 5.1% were German, and 1.1% were American.