The awnser is the Delaware river
Delaware
Pennsylvania borders the Delaware River. The river forms part of the boundary between Pennsylvania and New Jersey, but it does not border Ohio. Ohio is located to the west of Pennsylvania and is not directly adjacent to the Delaware River.
The river that separates Pennsylvania and New Jersey is the Delaware River. It also separates Pennsylvania and New York before flowing into the Atlantic Ocean.
The Delaware River is boundary river between Pennsylvania and New Jersey&New York.
Camden, New Jersey is directly adjacent to Philadelphia, Pennsylvania. Camden is due East of Philadelphia, on the opposite shores of the Delaware River.
Pennsylvania is in the eastern part of the United States. It is east of the Mississippi River.
The border between New Jersey and Pennsylvania is the Delaware River.
Manhattan Island is directly across the Hudson River from Jersey City.
The Delaware River forms the boundary between Pennsylvania and New Jersey.
The Delaware River forms Pennsylvania's eastern border. Across the river are New Jersey and New York
The Deleware River marks the border between New Jersey and Pennsylvania.