Swarthmore is a borough in Delaware County, Pennsylvania, United States. Swarthmore was originally named "Westdale" in honor of noted painter Benjamin West, who was one of the early residents of the town. The name was changed to "Swarthmore" after the establishment of Swarthmore College. The borough population was 6,194 as of the 2010 census.

Ridley Township is a township in Delaware County, Pennsylvania, United States. The population was 30,768 at the 2010 census. Ridley Township contains the (CDPs) of Folsom and Woodlyn, along with the unincorporated communities of Crum Lynne and Holmes and a portion of Secane.