Penn Township is one of thirteen townships in Parke County, Indiana, United States. As of the 2020 census, its population was 761 and it contained 340 housing units.
Penn Township was organized in 1854, and was originally built up chiefly by Quakers.
The Cox Ford Covered Bridge, Joseph Finney House, and Jackson Covered Bridge are listed on the National Register of Historic Places.
According to the 2010 census, the township has a total area of , of which (or 99.79%) is land and (or 0.21%) is water. The township includes the southwest quarter of Turkey Run State Park.
(This list is based on USGS data and may include former settlements.)
(These towns are listed as "historical" by the USGS.)
The township contains these four cemeteries: Bloomingdale, Coffin, DeBaun and Hethcoe.