SS Westralia was a 2,884 GRT cargo and passenger ship.

She served as a troopship in the First World War and was later converted into a hulk.

Sir J Laing & Sons, Sunderland, built her in 1897 for the Melbourne-based Huddart Parker line.

W. R. Carpenter and Company of Sydney bought her in 1927, had her engines removed and towed her to Rabaul for use as coal hulk, arriving in 1929.

In the Rabaul air raids on 20 January 1942 she was bombed and sunk in Simpson Harbour.