Glenolden is a borough in Delaware County, Pennsylvania, United States. The population was 7,223 at the 2020 census, up from 7,153 at the 2010 census. Glenolden is located at 39°53′56″N 75°17′33″W / 39.89889°N 75.29250°W. It is bordered to east and southeast by the borough of Folcroft, to the southwest by Norwood, to the northwest by Ridley To…Glenolden is a borough in Delaware County, Pennsylvania, United States. The population was 7,223 at the 2020 census, up from 7,153 at the 2010 census. Glenolden is located at 39°53′56″N 75°17′33″W / 39.89889°N 75.29250°W. It is bordered to east and southeast by the borough of Folcroft, to the southwest by Norwood, to the northwest by Ridley Township, to the north by Darby Township, and to the northeast by Collingdale.