Martins Creek is a 10.4-mile-long (16.7 km)[1] tributary of the Delaware River in eastern Pennsylvania in the United States.
[3] The East Fork rises to the south of Kittatinny Mountain in Upper Mount Bethel Township, Northampton County.
From the junction of the two forks, the main stream flows south the entire length of Washington and Upper Mt.
Bethel townships, passing through the boroughs of Roseto and Bangor, an area heavily marked by slate quarries.
The creek passes the former Alpha Portland Cement plant, the major industry in the town, and empties into the Delaware River.