At the 2000 census, there were 1,993 people, 714 households, and 571 families living in the township.

There were 744 housing units at an average density of 40.0 per square mile (15.4/km2).

Most of the Pennsylvania State Game Lands Number 280 is located in the southwestern part of the township.

[6] Pennsylvania Route 183 is the only numbered highway serving Penn Township.

It follows a northwest-southeast alignment across the western and southern portions of the township.