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.

Delaware County, colloquially referred to as Delco, is a county in the Commonwealth of Pennsylvania. With a population of 576,830 as of the 2020 census, it is the fifth-most populous county in Pennsylvania and the third-smallest in area. The county was created on September 26, 1789, from part of Chester County and named for the Delaware River. The county is part of the Southeast Pennsylvania region of the state.