Penn Township is a civil township of Cass County in the U.S. state of Michigan. The population was 1,755 at the 2020 census.
Penn Township is the location of the Bonine House, a lookout post on the Underground Railroad, on the corner of M-60 and Penn Road. Vandalia, located within Penn Township, also was affiliated with the Underground Railroad.
Communities
- Geneva was platted in 1831. It was the county seat at the time but not for much longer. The area is now known as Shore Acres.
Geography
Penn Township is located just northeast of the center of Cass County. The village of Vandalia is in the southeast part of the township.
According to the United States Census Bureau, the township has a total area of , of which is land and , or 5.18%, is water. Diamond Lake in the southwest and Donnell Lake in the southeast are the two largest lakes in the township.