Penn Township is one of twelve townships in Jay County, Indiana, United States. As of the 2020 census, its population was 1,133 (down from 1,239 at 2010[2]) and it contained 530 housing units.[1]
According to the 2010 census, the township has a total area of 30.21 square miles (78.2 km2), of which 30.19 square miles (78.2 km2) (or 99.93%) is land and 0.02 square miles (0.052 km2) (or 0.07%) is water.[2] The streams of Brooks Creek and Haines Creek run through this township.