Australian Maritime Safety Authority (AMSA) is an Australian statutory authority responsible for the regulation and safety oversight of Australia's shipping fleet and management of Australia's international maritime obligations. The authority has jurisdiction over Australia's exclusive economic zone which covers an area of 11,000,000 square kilometres (4,200,000 sq mi). AMSA maintains Australia's shipping registries: the general and the international shipping registers.

Responsibilities for traditional coast guard duties in Australia are distributed across various federal, state and community agencies. The de facto coast guard of Australia is the Maritime Border Command, a joint command of the Australian Defence Force and the Australian Border Force which works alongside the Australian Federal Police, the Australian Fisheries Management Authority, and the Australian Maritime Safety Authority. Each state and territory government have specific maritime safety agencies and police marine units. In addition, there are several private volunteer coast guard organisations which act as auxiliary search and rescue services and maritime safety educators with the largest organisations being the Royal Volunteer Coastal Patrol established in 1937, the Australian Volunteer Coast Guard established in 1961, and Marine Rescue New South Wales established in 2009.