Wallingford is an unincorporated community in Nether Providence Township, Delaware County in Pennsylvania, USA. Founded in 1687, it is named for Wallingford, England. In 2007, Wallingford was named by Money Magazine as the 9th best place to live in the United States; two other towns in the area made the top 15.It is west of Interstate 476 (known locally as the "Blue Route") and east of S. Providence Road, PA 252. Crum Creek forms the township's eastern border with Swarthmore Borough. Wallingford lies north of Chester on the southwest edge of the Philadelphia urban area. Wallingford is about 9 miles from Philadelphia proper.Located in Wallingford is the Helen Kate Furness Free Library, which was renovated in 2006. There is a dry cleaning shop and a post office. Various doctors, dentists and lawyers are also located in Wallingford.