Township administrative offices are located at 190 Rock Point Road, Marietta PA 17547.
In 1722, Chester County's Donegal Township became part of the newly-created Lancaster County. Donegal was divided into East and West more than a century later, in 1838. Early settlers of the area were farmers descended from Scoch-Irish immigrants. Part of East Donegal was taken to form Marietta Borough in 1812.
Nearby Towns: Elizabethtown Boro • Hallam Boro • Manchester Boro • Marietta Boro • Mount Wolf Boro • Springettsbury Twp • Wrightsville Boro • York Haven Boro • Yorkana Boro •