Between 2001 and 2021, the centre of population for Irwin (S) moves 0.4km north-north-east, with population increasing from 3,070 in 2001 to 3,770 in 2021. Centres of population based on 30 June populations and geographic centroids of MBs within the SA2 of Irwin (S). Blue = estimated, red = projected. Data: ABS/AIHW. Created by @AndyHowe_statto. AREA LIST