An SA2 is an ABS Statistical Area Level 2. It is often one suburb, but it can be several suburbs, or a large rural area. Do not read an SA2 as a suburb. SEIFA scores and deciles compare SA2s with each other across Australia, using 2021 Census data.
Download the file: seifa_sa2_2021.csv (589646 bytes), 2366 rows and one header line. Columns: sa2_code, sa2_name, irsd_score, irsd_decile, irsad_score, irsad_decile, ier_score, ier_decile, ieo_score, ieo_decile, usual_resident_population, source_url, licence.
SHA-256 of the CSV: c4b7b71afd11680ac612d4dcb944447837599249cd248f5880e142ed740b3aef
Source file: Statistical Area Level 2, Indexes, SEIFA 2021.xlsx (1316059 bytes), SHA-256 372124bbf1044e03216f87188f98b82d39a5a03a5138ed05e8f222abf8faf4f0, sheet Table 1 (Table 6 for the excluded SA2s).
Source: Australian Bureau of Statistics, Socio-Economic Indexes for Areas (SEIFA), Australia, 2021 (released 27 April 2023). Licence: CC BY 4.0, https://creativecommons.org/licenses/by/4.0/. Cleaned and reformatted; not endorsed by the ABS.
Each row is one SA2 from Table 1 of the ABS workbook, the rows with a 9-digit SA2 code. The four indexes are scores and deciles as published. The usual resident population is the 2021 Census count. Scores are not comparable across indexes.
A blank score or decile means the ABS did not score that index for the area (the workbook shows a dash). 13 SA2s have a score on some indexes but not others, and the build checks the blanks against the ABS Table 6 flags.
A lower score means the area is relatively more disadvantaged on that index. Decile 1 is the lowest 10% of SA2s on that index, and decile 10 the highest. Deciles count areas, not people, so a decile does not say how many people live in it.
88 SA2s in the population file have no score on any index, so they have no row here. The ABS lists them in Table 6 with all four indexes flagged. Table 6 also lists 18 areas that are not in the population file. Every other population SA2 joins on sa2_code.
Checks run before publishing: every SA2 code is 9 digits and unique, every SA2 with a row is in the population CSV, the blank indexes match the Table 6 flags, and the population SA2s with no row are exactly the Table 6 no-score areas in the population file. Every score and count is a whole number.
Joined to the population page by sa2_code: Population by SA2 2024-25. Also joined to the census page by sa2_code: Census 2021 by SA2.