Gilpin Township is a Second class Township in Armstrong County, Pennsylvania, United States. At the 2010 census it had a population of 2,496. As of the 2020 census, its population had decreased to 2,411, a 3.4% decrease.

The Kiskiminetas River is a tributary of the Allegheny River, approximately 27 miles (43 km) long, in Western Pennsylvania in the United States. The region stretching from the northern side of Harmar Township, Pennsylvania to the Kiskiminetas towns is often referred to by the locals as the Alle-Kiski Valley after the rivers.