Cogan House Township is a township in Lycoming County, Pennsylvania. The population was 974 at the 2000 census. It is part of the Williamsport, Pennsylvania Metropolitan Statistical Area.
Cogan House Township is bordered by Pine and Cummings Townships to the west, Jackson Township to the north, McIntyre and Lewis Townships to the east, and Lycoming, Anthony, and Mifflin Townships to the south.
Cogan House Township was formed parts of Jackson and Mifflin Townships on 6 December 1843. The source of Larry's Creek is in Cogan House Township, just south of the hamlet of Steam Valley. It flows west-southwest through the village of Cogan House, and then under the Cogan House Covered Bridge. The bridge is also known as the "Buckhorn Covered Bridge" (for a nearby mountain and vanished village) or the "Larry's Creek Covered Bridge" (for the creek it crosses). A petition from the citizens of Cogan House Township for a bridge to be built was filed on 4 September 1876. The 90 foot (27 m) long Burr arch truss bridge was built in 1877, rehabilitated in 1998, and is on the National Register of Historic Places. Larry's Creek was vitally important to the economic development of Cogan House Township. During the height of the lumber era that swept through Pennsylvania in the mid to late 1800s, Larry's Creek was used to float logs from the hills of the township to the lumber industry in nearby Williamsport on the West Branch Susquehanna River.
The township is named for David Cogan, a pioneer who settled on Larry's Creek in 1825. Cogan was the one of the few settlers in the area for many years. He grew tired of living alone in the wilderness and abandoned his homestead in 1842 as did a neighbor named Carter. Cogan and Carter's houses were used by hunters and travellers. The name Cogan's House was given to the area, hence the name, Cogan House.
