According to the United States Census Bureau, the township has a total area of 148.3 square miles (384.1 km2), of which 148.1 square miles (383.5 km2) is land and 0.23 square miles (0.6 km2), or 0.16%, is water.[3]
As of the census[5] of 2000, there were 3,466 people, 1,359 households, and 970 families residing in the township. The population density was 23.3 people per square mile (9.0 people/km2). There were 1,687 housing units at an average density of 11.3 units per square mile (4.4 units/km2). The racial makeup of the township was 99.28% White, 0.17% Native American, 0.26% Asian, and 0.29% from two or more races. Hispanic or Latino of any race were 0.23% of the population.
There were 1,359 households, out of which 27.4% had children under the age of 18 living with them, 60.0% were married couples living together, 7.7% had a female householder with no husband present, and 28.6% were non-families. 24.3% of all households were made up of individuals, and 12.7% had someone living alone who was 65 years of age or older. The average household size was 2.45 and the average family size was 2.92.
In the township the population was spread out, with 20.3% under the age of 18, 6.6% from 18 to 24, 28.3% from 25 to 44, 24.3% from 45 to 64, and 20.5% who were 65 years of age or older. The median age was 42 years. For every 100 females, there were 93.2 males. For every 100 females age 18 and over, there were 91.5 males.
The median income for a household in the township was $35,239, and the median income for a family was $39,826. Males had a median income of $32,067 versus $20,302 for females. The per capita income for the township was $15,683. About 4.0% of families and 6.9% of the population were below the poverty line, including 9.2% of those under age 18 and 7.4% of those age 65 or over.
