Western Australia is the westernmost state of Australia. Note that the name of this state is Western Australia and not West Australia. Some people get picky about that (and others don't). The capital city is Perth.
The SCA in Western Australia
Most SCA activity is focused in Perth, along with the Barony of Aneala. Although the Barony actually occupies the entire state of Western Australia, there is very little or no activity outside of Perth.