Western Kangaroo Island Marine Park is a marine protected area in the Australian state of South Australia located in the state’s coastal waters adjoining both the west coast of Kangaroo Island and Lipson Reef, an islet located to the south of Kangaroo Island.

[3]: 5, map 01  The first is the portion of coastal waters adjoining the coastline to the western end of Kangaroo Island extending from the middle of Sanderson Bay on the south coast to Cape Forbin on the north coast.

The seaward boundary is the limit of coastal waters which moves away from within 3 nautical miles (5.6 km; 3.5 mi) of the island in a northern-westerly direction towards the Eyre Peninsula while the northern boundary is a line with an east-west alignment and located about 4 kilometres (2.5 mi) north of Cape Forbin.

[3]: 5, 23, 26  The second is the coastal waters within 3 nautical miles (5.6 km; 3.5 mi) of Lipson Reef which is located about 16 kilometres (9.9 mi) south-east of Cape du Couedic.

[1][3]: 5, maps 01-05 The marine park is divided into zones to manage the marine environment to ensure varying degrees of “protection for habitats and biodiversity” and varying levels of “ecologically sustainable development and use” as follows:[1][3]: 5, 13–14, maps 01-05 The marine park is adjoined at the limits of coastal waters to the south-west by the Western Kangaroo Island Marine Park which is a marine protected area managed by the Australian government.