Linwood is a census-designated place in Delaware County, Pennsylvania, United States. The population was 3,281 at the 2010 census. Linwood is located in southern Delaware County at 39°49′33″N 75°25′22″W / 39.82583°N 75.42278°W. It occupies the eastern half of Lower Chichester and is home to more than 90% of the township's population. It is bord…Linwood is a census-designated place in Delaware County, Pennsylvania, United States. The population was 3,281 at the 2010 census. Linwood is located in southern Delaware County at 39°49′33″N 75°25′22″W / 39.82583°N 75.42278°W. It occupies the eastern half of Lower Chichester and is home to more than 90% of the township's population. It is bordered to the south by the borough of Marcus Hook and to the east by the borough of Trainer. The northern border is with Upper Chichester Township.