Devon-Berwyn was a census-designated place (CDP) in Chester County, Pennsylvania. The population was 5,067 at the 2000 census. For the 2010 census, the area was split into two separate CDPs, Devon and Berwyn. The area is part of the Philadelphia Main Line suburbs of Philadelphia. Devon-Berwyn spanned two townships, Tredyffrin, and Easttown, though the two current CDPs of Devon and Berwyn are only in Easttown Township.