As of the census of 2000, there were 21,912 people, 8,138 households, and 4,817 families residing in the county. The population density was 25 people per square mile (10/km2). There were 8,909 housing units at an average density of 10 per square mile (4/km2). The racial makeup of the county was 96.58% White, 1.35% Black or African American, 0.23% Native American, 0.87% Asian, 0.02% Pacific Islander, 0.21% from other races, and 0.74% from two or more races. Approximately 0.71% of the population were Hispanic or Latino of any race.