Statistical area level 1 (SA1) code (ASGS 2016) N(11)

A code set representing a geographical area aggregated from whole Mesh Blocks.

SA1s have generally been designed as the smallest unit for the release of data from the Australian Bureau of Statistics's Census of Population and Housing. SA1s have a population of between 200 and 800 people with an average population size of approximately 400 people.

SA1 coding structure:

SA1s are identified by an 11-digit fully hierarchical code. The SA1 identifier is a 2-digit code, assigned within a Statistical area level 2 (SA2).

There are 57,523 SA1s. In aggregate, they cover the whole of Australia without gaps or overlaps. These include 33 non-spatial SA1 special purpose codes, comprising Migratory–Offshore–Shipping and No Usual Address codes for each State and Territory.

SA1s are designed to be either a predominantly rural or predominantly urban in character, with SA1s in rural and remote areas generally having a lower population than in urban areas. SA1s are designed to be internally connected by road, except for groups of unpopulated islands and Aboriginal and Torres Strait Islander communities, which may not be contiguous. Areas without permanent population (such as lakes, commercial areas, national parks etc.) are often represented by 'zero SA1s' - these are SA1s with an effective design population of zero.

SA1s are also used as the building blocks for a number of Australian Statistical Geography Standard (ASGS) defined regions including the Indigenous Structure, the Section of State and Urban Centre and Localities Structures, and the Remoteness Structure. Within the Non-ABS Structure, SA1s are used to approximate a number of administrative regions, such as Commonwealth Electoral Divisions and State Electoral Divisions.

Australian Institute of Health and Welfare

Australian Bureau of Statistics 2016. Australian Statistical Geography Standard (ASGS): Volume 1 - Main Structure and Greater Capital City Statistical Areas July 2016. ABS cat. no. 1270.0.55.001. Canberra: ABS

Supersedes Statistical area level 1 (SA1) code (ASGS 2011) N(11) Health, Superseded 06/12/2016, Early Childhood, Superseded 24/07/2018, Community Services (retired), Standard 06/12/2011

Address—statistical area, level 1 (SA1) code (ASGS 2016) N(11) Health, Standard 06/12/2016
Early Childhood, Standard 24/07/2018

Person—area of usual residence, statistical area level 1 (SA1) code (ASGS 2016) N(11) Health, Standard 06/12/2016
Early Childhood, Standard 24/07/2018
Commonwealth Department of Social Services (retired), Not progressed 15/04/2019