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.

The J, K and N class consisted of 24 destroyers built for the Royal Navy beginning in 1938. They were a return to a smaller vessel, with a heavier torpedo armament, after the Tribal class that emphasised guns over torpedoes. The ships were built in three flotillas or groups, each consisting of eight ships with names beginning with "J", "K" and "N". The flag superior of the pennant numbers changed from "F" to "G" in 1940.