The Delaware River is a major river on the Atlantic coast of the United States. It drains an area of 14,119 square miles (36,570 km2) in five U.S. states: Delaware, Maryland, New Jersey, New York, Pennsylvania. Rising in two branches in New York state's Catskill Mountains, the river flows 419 miles (674 km) into Delaware Bay where its waters enter the Atlantic Ocean near Cape May in New Jersey and Cape Henlopen in Delaware. Not including Delaware Bay, the river's length including its two branches is 388 miles (624 km). The Delaware River is one of nineteen "Great Waters" recognized ... Source: Wikipedia