As of the census of 2000, there were 37,410 people, 15,286 households, and 10,149 families living in the county. The population density was 44 people per square mile (17/km2). There were 16,203 housing units at an average density of 19 per square mile (7/km2). The racial makeup of the county was 91.58% White, 0.28% Black or African American, 5.31% Native American, 0.65% Asian, 0.07% Pacific Islander, 0.50% from other races, and 1.60% from two or more races. 1.93% of the population were Hispanic or Latino of any race. 25.1% were of German, 11.3% English, 11.0% American, 8.9% Irish and 5.6% Norwegian ancestry.