Van Diemen Gulf

Map showing Van Diemen Gulf. Darwin is in lower left corner.

Van Diemen Gulf (11°49′S 131°57′E / 11.817°S 131.950°E / -11.817; 131.950Coordinates: 11°49′S 131°57′E / 11.817°S 131.950°E / -11.817; 131.950) is a gulf between Arnhem Land, of the attached Cobourg Peninsula and Melville Island in northern Australia. It is connected to the Timor Sea in the west by the Clarence Strait (near the city of Darwin), and to the Arafura Sea in the north by Dundas Strait (between Melville Island and Cobourg Peninsula). It is bounded to the southeast by the Kakadu National Park. It stretches over an area of about 14,000 km².

Rivers draining into the Gulf include the South Alligator River, the East Alligator River and the Adelaide River.