Cape Don Light is an active lighthouse located on Cape Don, at the tip of the Cobourg Peninsula, Northern Territory, Australia, in Garig Gunak Barlu National Park, marking the entrance to the Dundas Strait. It is Australia's northernmost traditional lighthouse. The station served on the important route to Darwin, between the peninsula and Melville Island. The tower was constructed in 1915-1917, during the "Golden Age of Australian Lighthouses" (1913–1920), and the tower was manned until 1983.