Tobias and Isaac Kepner were largely influential in having Penn Township erected in 1828 and, having come from a place of the same name in Berks County they gave to it the name of the illustrious founder of the Commonwealth.

It is the twenty-third in size in the county and has an area of 10,880 acres. Columbia County bounds it on the east and Shrewsbury Township on the north. Wolf lies on the west and Moreland on the south. The elevation is high and the climate delightful in summer time.
The surface of the township is, generally rough and mountainous, making it poorly adapted for farming. At one time it was a great lumbering center.

The early settlers were among those who first came to Muncy Township, among them being Benoni Wiesner, Christopher Frey, Thomas Strawbridge, John Craft and Thomas Reed, names still well known in the community.

Church and school accommodations are of the best and the township is inhabited by a sturdy class of American citizens. A postoffice was established at Fribley June 26, 1873, but was abandoned on the advent of rural free delivery. There was also one at North Mountain
but it, too has since been discontinued. At present there are postoffices at Mawrglen and Tivoli. In 1920 the township had a population of 658.