As of the census of 2000, there were 18,815 people, 7,398 households, and 4,882 families in the county. The population density was 32 people per square mile (12/km2). There were 8,556 housing units at an average density of 15 per square mile (6/km2). The racial makeup of the county was 96.74% White, 0.55% Black or African American, 0.23% Native American, 1.07% Asian, 0.05% Pacific Islander, 0.49% from other races, and 0.87% from two or more races. 1.20% of the population were Hispanic or Latino of any race.