Overview
Tredyffrin Township (Welsh: Tre (town) + Dyffryn (valley)) is a township located in
eastern Chester County, Pennsylvania, USA. The population was 29,062 at the
2000 census. It is the largest municipality in Chester County.
Originally settled in the late 17th century, Tredyffrin is bounded by Delaware and
Montgomery Counties. It includes on its northern boundary a small part of Valley
Forge National Historical Park, where George Washington encamped during the
American War of Independence. Tredyffrin and the entire Great Valley region also
have many limestone deposits.
Unincorporated communities within Tredyffrin Township include Berwyn, Devon,
Paoli, Chesterbrook, Strafford, & part of Wayne. Tredyffrin is bordered by Easttown,
East Whiteland, Willistown, Charlestown, and Schuylkill townships. Tredyffrin
is one of the municipalities of the fabled and historic "Main Line".
