Westralia was a common contraction of Western Australia in the 19th and 20th centuries.
Westralia may refer to:
Secessionism in WA
Ships
- , the name of two ships to serve in the Royal Australian Navy
- , an armed merchant cruiser and later, infantry landing ship, operated during World War II
- , a replenishment tanker operated between 1989 and 2006
- , a passenger liner converted into a troopship and sunk in 1942
See also