 There were 21,253 housing units at an average density of 13.6 per square mile (5.3 square kilometers).72.3% of the population were White, 15.8% Native American, 6.5% Black or African American, 0.6% Asian, 0.1% Pacific Islander, 0.2% of some other race and 4.6% of two or more races.1.2% were Hispanic or Latino (of any race).