HMAS Tobruk (D37) was a Battle-class destroyer of the Royal Australian Navy (RAN). Built at the Cockatoo Island Dockyard, the destroyer was completed in 1950. Tobruk was deployed to the Korean War twice, and served with the Far East Strategic Reserve on three occasions during the late 1950s. In 1960, she was damaged beyond economical repair by sister ship HMAS Anzac during a gunnery exercise, which led to the destroyer's decommissioning that year, and sale for scrap in 1971.

The Battle class were a class of destroyers of the British Royal Navy (RN) and Royal Australian Navy (RAN), named after naval or other battles fought by British or English forces. Built in three groups, the first group were ordered under the 1942 naval estimates. A modified second and third group, together with two ships of an extended design were planned for the 1943 and 1944 estimates. Most of these ships were cancelled when it became apparent that the war was being won and the ships would not be required, although two ships of the third group, ordered for the RAN, were not cancelled and were subsequently completed in Australia.