As of the 2000 United States Census there were 19,717 people, 7,131 households, and 5,448 families residing in the township. The population density was 485.3 people per square mile (187.4/km2). There were 7,527 housing units at an average density of 185.2 per square mile (71.5/km2). The racial makeup of the township was 96.14% White, 0.83% African American, 0.16% Native American, 1.07% Asian, 0.05% Pacific Islander, 0.62% from other races, and 1.14% from two or more races. Hispanic or Latino of any race were 3.41% of the population.