Devon-Berwyn is a census-designated place (CDP) in Chester County, Pennsylvania, United States. The population was 5,067 at the 2000 census. The area is part of Philadelphia's Main Line suburbs. Berwyn spans two townships – Tredyffrin and Easttown.
Devon-Berwyn is located at 40°2′37″N 75°26′10″W / 40.04361°N 75.43611°W / 40.04361; -75.43611 (40.043675, -75.436130).
According to the United States Census Bureau, the CDP has a total area of 2.5 square miles (6.5 km²), all of it land.