[5] The Mishawaka Reservoir Caretaker's Residence was listed on the National Register of Historic Places in 1998.

[6] According to the United States Census Bureau, Penn Township covers an area of 63.58 square miles (164.7 km2); of this, 62.5 square miles (162 km2) (98.29 percent) is land and 1.08 square miles (2.8 km2) (1.71 percent) is water.

(This list is based on USGS data and may include former settlements.)

The township contains these seven cemeteries: Chapel Hill Memorial Gardens, Eutzler, Fairview, Ferrisville, Pleasant Valley, Saint Josephs and Saint Josephs.

Penn Township residents may obtain a free library card from any branch of the Mishawaka-Penn-Harris Public Library system.