Statistical Areas Level 2 (SA2) are medium-sized general purpose areas built from whole Statistical Areas Level 1 (SA1). Whole SA2s aggregate to form Statistical Areas Level 3 (SA3) in the ASGS Main Structure. Further information about these regions can be found in the following publication: Australian Statistical Geography Standard (ASGS) Edition 3 https://www.abs.gov.au/statistics/standards/australian-statistical-geography-standard-asgs-edition-3/jul2021-jun2026