The Turkey River is a 6.1 mile long (9.9 km) stream located in southern New Hampshire in the United States. It is a tributary of the Merrimack River, which flows to the Gulf of Maine. The Turkey River begins at the outlet of Little Turkey Pond in Concord, New Hampshire. The river travels southeast through the campus of St. Paul's School, winding through the outskirts of Concord, and entering Bow before joining the Merrimack near the junction of Interstate 93 and Interstate 89.