As of the census of 2000, there were 79,981 people, 29,383 households, and 17,042 families in the county. The population density was 140 people per square mile (54/km2). There were 30,630 housing units at an average density of 54 per square mile (21/km2). The racial makeup of the county was 91.14% White, 1.83% Black or African American, 0.16% Native American, 5.10% Asian, 0.03% Pacific Islander, 0.60% from other races, and 1.14% from two or more races. 1.55% of the population were Hispanic or Latino of any race.