As of the census of 2000, there were 11,563 people, 4,378 households, and 3,349 families residing in the township. The population density was 399.0 people per square mile (154.1/km). There were 4,584 housing units at an average density of 158.2 per square mile (61.1/km). The racial makeup of the township was 98.94% White, 0.29% African American, 0.11% Native American, 0.22% Asian, 0.10% from other races, and 0.35% from two or more races. Hispanic or Latino of any race were 0.42% of the population.