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Socio-Economic Indexes for Areas (SEIFA) (2011 Census, ASGS 2011) cluster

Identifying and definitional attributes

Metadata item type:Help on this termData Set Specification
METeOR identifier:Help on this term517903
Registration status:Help on this termHealth, Superseded 06/09/2018
Early Childhood, Superseded 24/07/2018
Community Services (retired), Not progressed 23/01/2018
DSS type:Help on this termData Element Cluster
Scope:Help on this term

The SEIFA cluster contains data elements that may be used to ascertain a SEIFA score for a geographic area which is a measure of the collective socio-economic status of the people living in the area.

The person level geographical location data elements in this cluster refer to the person's usual residence. This is defined below.

When collecting the geographical location of a person's usual place of residence, the Australian Bureau of Statistics (ABS) recommends that 'usual' be defined as: 'the place where the person has or intends to live for 6 months or more, or the place that the person regards as their main residence, or where the person has no other residence, the place they currently reside.' Apart from collecting a person's usual place of residence there is also a need in some collections to collect area of residence immediately prior to or after assistance is provided, or at some other point in time.

Collection and usage attributes

Guide for use:Help on this termSEIFA 2011 is a suite of four summary measures produced by the ABS from social and economic information in the 2011 Census of Population and Housing. The indexes reflect the socio-economic wellbeing of a geographic area, rather than that of individuals. They were calculated at the Statistical Area Level 1 (SA1), and reflect SA1 characteristics. For each index, every geographic area in Australia is given a SEIFA score which measures how relatively 'advantaged' or 'disadvantaged' that area is compared with other areas in Australia.  

Each index summarises a different aspect of the socio-economic conditions of people living in an area. They each summarise a different set of social and economic information. The indexes provide more general measures of socio-economic status than is given by measuring income or unemployment alone, for example.

The four indexes in SEIFA 2011 are:

  • Index of Relative Socio-economic Disadvantage (IRSD): IRSD is a general socio-economic index derived from Census variables related to disadvantage, such as low income, low educational attainment, unemployment, and dwellings without motor vehicles.
  • Index of Relative Socio-economic Advantage and Disadvantage (IRSAD): IRSAD is a continuum of advantage (high values) to disadvantage (low values) which is derived from Census variables related to both advantage and disadvantage, like household with low income and people with a tertiary education.
  • Index of Economic Resources (IER): IER summarises variables relating to the financial aspects of relative socioeconomic advantage and disadvantage. These include indicators of high and low income, as well as variables that correlate with high or low wealth.
  • Index of Education and Occupation (IEO): IEO summarises variables relating to the educational and occupational aspects of relative socio-economic advantage and disadvantage. This index focuses on the skills of the people in an area, both formal qualifications and the skills required to perform different occupations.

The concept of relative socio-economic disadvantage is neither simple, nor well defined. SEIFA uses a broad definition of relative socio-economic disadvantage in terms of people's access to material and social resources, and their ability to participate in society. While SEIFA represents an average of all people living in an area, SEIFA does not represent the individual situation of each person. Larger areas are more likely to have greater diversity of people and households.

The Australian Statistical Geography Standard (ASGS) (ABS cat no 1270.0.55.001) replaced the Australian Standard Geographical Classification (ASGC) as the main geographical framework for the 2011 Census. However, Statistical Local Area and Local Government Area geography units from the ASGC are still supported for the 2011 Census and 2011 SEIFA.

Data cubes for the SEIFA 2011 indexes are available for the following geographic units:

  • Statistical Area Level 1 (SA1);
  • Statistical Area Level 2 (SA2);
  • Statistical Local Area (SLA);
  • Local Government Area (LGA);
  • State Suburb (SSC); and
  • Postal Area (POA).

The basic geographic unit used to create SEIFA 2011 is SA1. SLAs and LGAs are larger geographic units in the ASGC. POAs are an SA1-based approximation of Australia Post postcodes.  

The data cube for the SA1 level indexes contains the index scores for each of the four indexes, as well as the associated ranks, deciles and percentiles at the national and state/territory level. All other data cubes are derived from the SA1 level data cube.

Population Distribution and SA1 Distribution data cubes have also been released by the ABS to assist users in understand the diversity of the socio-economic conditions of SA1s within larger areas.

Due to changes between the 2006 SEIFA (based on 2006 Census and ASGC geography framework) and the 2011 SEIFA (based on 2011 Census and ASGS geography framework), users who need to make comparisons between the SEIFAs, such as for time series performance reporting purposes, should contact geography@abs.gov.au to clarify issues that need to be considered for their data.

Collection methods:Help on this term

SEIFA indexes are assigned to areas, not to individuals. They indicate the collective socio-economic status of the people living in an area. A relatively disadvantaged area is likely to have a high proportion of relatively disadvantaged people. However, such an area is also likely to contain people who are not disadvantaged, as well as people who are relatively advantaged.

The data elements listed below are used to determine the geographic unit which can be examined on the SEIFA indexes.

Statistical Area Level 1 (SA1): For an SA1 geographic unit either of the following data elements can be collected:

  • Person—area of usual residence, statistical area level 1 (SA1) code (ASGS 2011) N(11); or
  • Address—statistical area, level 1 (SA1) code (ASGS 2011) N(11) 

Statistical Area Level 2 (SA2): For an SA2 geographic unit the following data element can be collected:

  • Person—area of usual residence, statistical area level 2 (SA2) code (ASGS 2011) N(9).

Statistical Local Area (SLA): The SLA geographical unit from the ASGC geography framework is being supported for the 2011 Census and 2011 SEIFA. For an SLA geographic unit the following data element can be collected:

  • Person—area of usual residence, geographical location code (ASGC 2011) NNNNN.

Collection of locality, postcode and state/territory

The collection of information about a person's or service provider organisation's locality, postcode and state/territory enables the geographical entity to be ascertained which can then be examined in the relevant SEIFA index. The SLA geographical unit from the ASGC geography framework is being supported for the 2011 Census and 2011 SEIFA. The collection of residential postcode + locality + state/territory can be mapped to SA2 or SLA. Where locality, postcode and state/territory are collected, there are a number of concordance/correspondence files available from geography@abs.gov.au which can assist in assigning geographic area codes, such as: 

  • 2011 localities (and postcode and state/territory) to 2011 SA2
  • 2011 localities (and postcode and state/territory) to 2011 SLAs.

Source and reference attributes

Submitting organisation:Help on this termAustralian Institute of Health and Welfare.
Reference documents:Help on this term

Summary: Socio-Economic Indexes for Areas (SEIFA), 2011 (ABS cat no 2033.0.55.001)

Socio-Economic Indexes for Areas (SEIFA) - Technical Paper 2011 (ABS cat no 2033.0.55.011)

Relational attributes

Related metadata references:Help on this term

Has been superseded by Socio-Economic Indexes for Areas (SEIFA) (2011 Census, ASGS 2016) cluster Early Childhood, Superseded 24/07/2018

Has been superseded by Socio-Economic Indexes for Areas (SEIFA) (2016 Census, ASGS 2016) cluster Health, Standard 06/09/2018, Early Childhood, Standard 24/07/2018

Supersedes Socio-Economic Indexes for Areas (SEIFA) cluster 2011 Early Childhood, Superseded 28/05/2014, Disability, Standard 13/08/2015, Community Services (retired), Standard 21/02/2012

Implementation in Data Set Specifications:Help on this term
All attributes +

Early Childhood Education and Care: Unit Record Level NMDS 2014 Early Childhood, Superseded 01/06/2015

Parent DSS specific attributes +

Early Childhood Education and Care: Unit Record Level NMDS 2015 Early Childhood, Superseded 24/07/2018

Parent DSS specific attributes +

Early Childhood Education and Care: Unit Record Level NMDS 2016 Early Childhood, Superseded 24/07/2018

Parent DSS specific attributes +

Early Childhood Education and Care: Unit Record Level NMDS 2017 Early Childhood, Superseded 24/07/2018

Parent DSS specific attributes +

National Bowel Cancer Screening Program NBEDS 2014-18 Health, Superseded 06/09/2018

Parent DSS specific attributes +

Metadata items in this Data Set SpecificationHelp on this term

Seq No.Help on this termMetadata itemHelp on this term ObligationHelp on this term Max occursHelp on this term
-Collection of locality, postcode and state/territory for SEIFA clusterOptional1
-Address—statistical area, level 1 (SA1) code (ASGS 2011) N(11)Optional1
-Person—area of usual residence, geographical location code (ASGC 2011) NNNNNOptional1
-Person—area of usual residence, statistical area level 1 (SA1) code (ASGS 2011) N(11)Optional1
-Person—area of usual residence, statistical area level 2 (SA2) code (ASGS 2011) N(9)Optional1
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