highland region in Wayne, Pike, Monroe, and eastern Carbon counties of northeastern Pennsylvania, U.S. The Poconos are bounded on the west by the Lehigh River; on the northwest by river valleys containing the cities of Scranton and Wilkes-Barre; and on the east by the Delaware River, which forms the Pennsylvania-New York and Pennsylvania-New Jersey borders. The Poconos were part of the notorious Walking Purchase (1737) negotiated between Thomas Penn (then proprietor of Pennsylvania) and the Delaware Indians