As of the census of 2000, there were 277,359 people, 104,529 households, and 74,320 families living in the county. The population density was 399 people per square mile (154/km2). There were 113,023 housing units at an average density of 163 per square mile (63/km2). The racial makeup of the county was 96.80% White, 0.58% Black or African American, 0.18% Native American, 1.11% Asian, 0.04% Pacific Islander, 0.38% from other races, and 0.92% from two or more races. 1.19% of the population were Hispanic or Latino of any race. 18.1% were of Irish, 14.6% English, 11.8% Italian, 10.5% French, 8.0% French Canadian, 6.0% German and 5.6% American ancestry. 94.3% spoke English, 1.8% French and 1.3% Spanish as their first language.