HMAS Manoora was an ocean liner that served in the Royal Australian Navy (RAN) during World War II. She was built in Scotland in 1935 for the Cairns to Fremantle coastal passenger run for the Adelaide Steamship Company. She was requisitioned by the RAN for naval service in 1939. Manoora was initially converted into an armed merchant cruiser (AMC), operating primarily in Australian, New Guinea, and Pacific waters, with deployments to Singapore and the Bay of Bengal.