As of the census of 2000, there were 39,564 people, 15,027 households, and 10,579 families living in the county. The population density was 8 people per square mile (3/km2). There were 19,085 housing units at an average density of 4 per square mile (1/km2). The racial makeup of the county was 75.32% White, 0.28% Black or African American, 11.47% Native American, 0.44% Asian, 0.07% Pacific Islander, 9.58% from other races, and 2.84% from two or more races. 14.38% of the population were Hispanic or Latino of any race. 14.0% were of German, 9.5% English, 9.2% United States or American and 6.8% Irish ancestry.