Wallingford is an unincorporated community in Nether Providence Township, Delaware County, Pennsylvania, United States. Founded in 1687, it is named for Wallingford, England. In 2007, Wallingford was named by Money Magazine as the ninth best place to live in the United States; two other towns in the area made the top 15. Most locations in Nether Providence use Wallingford's ZIP code.

Nether Providence Township is a first class township in Delaware County, Pennsylvania, United States. Many residents refer to the township by the name of its largest community, Wallingford, because the Wallingford postal code is used for most of the township. The population of the township was 13,706 at the 2010 census.