Web2000 census. As of the census of 2000, there were 100,399 people, 39,821 households, and 28,233 families living in the county. The population density was 20 people per square mile (8/km 2).There were 43,284 housing units at an average density of 9 per square mile (3/km 2).The racial makeup of the county was 93.86% White, 0.18% Black or African American, …