Between 1991 and 2021, the centre of population for Perth - South West moves 5.9km south, with population increasing from 236,000 in 1991 to 459,000 in 2021. Centres of population based on 30 June populations and geographic centroids of SA1s within the SA4 of Perth - South West. Blue = estimated, red = projected. Data: ABS/AIHW. Created by @AndyHowe_statto. AREA LIST