Summerdale is an unincorporated community located in East Pennsboro Township, Cumberland County, Pennsylvania, United States.

[1] Central Pennsylvania College and the Capital Area Intermediate Unit are located in Summerdale.

As people from Harrisburg came over the river during the summers, a dance hall was erected to support their need to party, thus, starting the town of Summerdale.

[citation needed] In 2009, Summerdale held a Centennial Celebration.

There was a parade, games, and a year-long celebration dedicated to the small town of Summerdale.