As of the census of 2000, there were 72,392 people, 29,005 households, and 20,535 families residing in the county. The population density was 111 people per square mile (43/km2). There were 32,387 housing units at an average density of 50 per square mile (19/km2). The racial makeup of the county was 98.32% White, 0.82% Black or African American, 0.09% Native American, 0.12% Asian, 0.02% Pacific Islander, 0.13% from other races, and 0.50% from two or more races. 0.43% of the population were Hispanic or Latino of any race. 34.6% were of German, 10.8% Italian, 9.3% Irish, 8.7% American, 7.4% English and 5.7% Polish ancestry.