SS Westralia was a 2,884 GRT cargo and passenger ship. She served as a troopship in World War I and was later converted into a hulk. She was sunk in the air raids on Rabaul on 20 January 1942. Sir J Laing & Sons, Sunderland built her in 1897 for the Melbourne-based Huddart Parker line. She served along the Australian coast and the trans-Tasman route. In 1917 she served as a troopship, transporting the New Zealand 27th and 28th Main Regiment. She then resumed commercial service with Huddart Parker.