 The population density was 22.8/sqmi (8.81/km²).There were 16,612 housing units at an average density of 13 per square mile (5/km²).The racial makeup of the county was 89.35% White, 0.19% Black or African American, 7.52% Native American, 0.36% Asian, 0.01% Pacific Islander, 0.24% from other races, and 2.32% from two or more races.