 The population density was 4 people per square mile (1/km²).There were 15,921 housing units at an average density of 2 per square mile (1/km²).The racial makeup of the county was 91.62% White, 0.73% Black or African American, 1.01% Native American, 0.64% Asian, 0.04% Pacific Islander, 3.59% from other races, and 2.37% from two or more races.