Easttown Township is a township in Chester County, Pennsylvania, United States. The population was 10,984 at the 2020 census. The township, which lies in the western half of Philadelphia's Main Line suburbs, is comprised predominantly of parts of two unincorporated areas: Devon and Berwyn. A small portion of the township has a Paoli address.

Berwyn is a census-designated place (CDP) in Chester County, Pennsylvania, United States. Berwyn is located in Tredyffrin and Easttown townships. The area is part of the Philadelphia Main Line suburbs.