According to the United States Census Bureau, the township has a total area of 21.3 square miles (55 km2), all land.

The census-designated place of Penns Creek is situated along the northern border of the township.

It is predominantly a rural township, approximately one hour north of the state capital of Harrisburg.

Pennsylvania Route 104 runs through the town of Penns Creek in the township.

17.2% of all households were made up of individuals, and 6.6% had someone living alone who was 65 years of age or older.