HMAS Lonsdale is a former Royal Australian Navy (RAN) training base that was located at Beach Street, , Victoria, Australia. Originally named Cerberus III, the Naval Reserve Base was commissioned as HMAS Lonsdale on 1 August 1940 during World War II.
Lonsdale was decommissioned in 1992, and the site now houses a luxury apartment complex known as HM@S Lonsdale, designed by Fender Katsalidis Architects.