As of the census of 2000, there were 20,454 people, 7,966 households, and 5,432 families residing in the county. The population density was 24 people per square mile (9/km2). There were 8,872 housing units at an average density of 11 per square mile (4/km2). The racial makeup of the county was 96.99% White, 0.61% Black or African American, 0.79% Native American, 0.31% Asian, 0.03% Pacific Islander, 0.31% from other races, and 0.95% from two or more races. Approximately 0.84% of the population were Hispanic or Latino of any race.