The Hackensack River courses southward for approximately 50 miles (80 km) through Rockland County in New York and Bergen and Hudson counties in northeastern New Jersey, forming the border of the latter two for part of its length. Its source, as identified by the U.S. Geological Survey (Hydrological code 02030103901), is in New City, New York. The river empties into Newark Bay between Kearny Point (South Kearny) and Droyer's Point (Jersey City).