Great Australian Bight Marine Park (formerly Great Australian Bight Commonwealth Marine Reserve) is a marine protected area located in the Great Australian Bight south of South Australia in waters within the Australian Exclusive economic zone.

[3] It was gazetted in November 2012 to replace the Great Australian Bight Marine Park (Commonwealth waters).

[4] The marine park consists of three zones - a marine national park zone (IUCN Category II) with an area of 7,728 square kilometres (2,984 square miles), a multiple use zone (IUCN Category VI) with an area of 22,682 square kilometres (8,758 square miles) and a special purpose zone (IUCN Category VI) which occupies three separate areas of ocean with a total area of 15,516 square kilometres (5,991 square miles).

[2][3] The purpose of the marine park is to protect habitat used for calving by the Southern right whale and as a feeding area for the following species - Australian sea lion, sperm whale, short-tailed shearwater and great white shark.

[5] It lies to the west of the Western Eyre Marine Park.