 The population density was 15.7 per square mile (6.1/km²).There were 620 housing units at an average density of 9.0 per square mile (3.5/km²).The racial makeup of the township was 96.48% White, 0.46% African American, 0.56% Native American, 0.56% Asian, 0.28% from other races, and 1.67% from two or more races.