At the 2000 census there were 40,721 people, 15,997 households, and 11,597 families living in the township. The population density was 531.5 people per square mile (205.2/km). There were 16,799 housing units at an average density of 219.2/sq mi (84.7/km). The racial makeup of the township was 97.42% White, 1.11% Black or African American, 0.08% Native American, 0.84% Asian, 0.04% Pacific Islander, 0.11% from other races, and 0.40% from two or more races. Hispanic or Latino people of any race were 0.38%.