HMAS Nestor (G02) was an N-class destroyer of the Royal Australian Navy (RAN). Built in Scotland, Nestor was commissioned in February 1941; although manned by Australians and commissioned as an Australian warship, she remained the property of the Royal Navy.
Entering service in 1941, Nestor spent most of her career as a patrol and escort vessel in the Atlantic Ocean, the Mediterranean, and the Far East. In December 1941, the destroyer located and sank the . In June 1942, Nestor sailed as part of the Operation Vigorous escort force, protecting a supply convoy to Malta. On the evening of 15 June, the ship was heavily damaged by air attack. Despite attempts to tow the ship to base, Nestor was abandoned and scuttled off Crete the next morning. Nestor is the only ship of the RAN that never operated in Australian waters. Nestor was long overall and long between perpendiculars, had a beam of , and a maximum draught of . Nestor was capable of reaching . On 14 May, the sailors aboard mutinied in response to the heavy drinking sessions of the ship's captain and two other senior officers: they locked themselves in their accommodations and refused to man the ship until the officers were removed. Nestor was transferred to the Mediterranean in July, and was involved in the Malta Convoys, then performed escort duties in the South Atlantic before returning to England for refit in October. In May 1942, the destroyer was assigned back to the Mediterranean. began to tow Nestor, but by 05:30 on 16 June, the quantity of water taken on by the Australian ship meant that recovery was no longer practical.
Nestors wartime service was recognised with four battle honours: "Bismarck 1941", "Atlantic 1941", "Malta Convoys 1941–42", and "Indian Ocean 1942". The ship's bell was recovered, and is on display at the museum at .