As of the census of 2000, there were 37,914 people, 14,773 households, and 9,927 families residing in the county. The population density was 43 people per square mile (16/km2). There were 18,166 housing units at an average density of 20 per square mile (8/km2). The racial makeup of the county was 98.3% White, 0.52% Black or African American, 0.1% Native American, 0.4% Asian, <0.1% Pacific Islander, 0.2% from other races, and 0.5% from two or more races. 0.5% of the population were Hispanic or Latino of any race. 36.0% were of German, 15.6% American, 9.6% Irish, 8.6% Italian and 7.4% English ancestry.