As of the census of 2000, there were 4,139 people, 1,494 households, and 1,177 families residing in the township. The population density was 127.9 people per square mile (49.4/km). There were 1,518 housing units at an average density of 46.9/sq mi (18.1/km). The racial makeup of the township was 97.83% White, 0.29% African American, 0.58% Native American, 0.24% Asian, 0.10% Pacific Islander, 0.10% from other races, and 0.87% from two or more races. Hispanic or Latino of any race were 0.41% of the population.