Wallingford is an unincorporated community in Nether Providence Township, Delaware County, Pennsylvania, United States.

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.

Wallingford is located along SEPTA's Media/Wawa Line, and has a station whose design is attributed to the well-known Victorian architect Frank Furness.

The Thomas Leiper Estate, Westlawn and Wolley Stille are listed on the National Register of Historic Places.

The first area school started in 1810 and was built on a portion of a 78-acre (32 ha) land grant of farmer and friend of William Penn.

[7] Originally Nativity BVM was to be the location of the merged school, but St. John Chrystosom appealed and the archdiocese changed its decision.

Wallingford has a humid subtropical climate (Cfa) and average monthly temperatures range from 33.0 °F in January to 77.9 °F in July.