As of the 2000 United States Census there were 4,478 people, 1,643 households, and 1,302 families residing in the township. The population density was 121.9 people per square mile (47.1/km2). There were 1,701 housing units at an average density of 46.3 per square mile (17.9/km2). The racial makeup of the township was 97.70% White, 0.40% African American, 0.04% Native American, 1.03% Asian, 0.02% Pacific Islander, 0.25% from other races, and 0.56% from two or more races. Hispanic or Latino of any race were 1.14% of the population.