Notes on the data: Age distribution

Total population by broad age groups: 0-14, 15-24, 25-44, 45-64, 65+, 70+, 85+ years, 2015 ERP


Policy context:  In the 2011 Census, there were 21,507,717 people in Australia - of these 49.4% were male and 50.6% were female. Aboriginal and Torres Strait Islander peoples made up 2.5% of the population [1]. Children aged 0-14 years made up 19.3% of the population and people aged 65 years and over made up 14.0% of the population [2]. In future years, population ageing will increase as the first major bulge in the population pyramid, comprising the Baby Boom Generation (those born between 1946 and 1966), enters older age [3].

These trends have significant implications for the future planning and provision of services, especially in health, housing, welfare and education.


  1. Australian Bureau of Statistics (ABS). 100 years of Australian lives (population) - Reflecting a Nation: Stories from the 2011 Census, 2012-2013. (ABS Cat. no. 2071.0). Canberra: ABS; 2012.
  2. ABS. 2011 Census QuickStats [Internet]. Canberra: ABS; 2013 Mar [cited 2013 Oct 18]. Available from:
  3. ABS. Australian Social Trends, 2009. (ABS Cat. no. 4102.0). Canberra: ABS; 2009.

Notes:  The Estimated Resident Population (ERP) is derived by applying the following adjustments to the usual residence Census counts:

  • removing overseas visitors who were in Australia on Census night from the Census counts;
  • adjusting the Census counts for undercounting using results of the Post Enumeration Survey;
  • including Australian residents who were temporarily absent overseas on Census night; and
  • backcasting the resulting estimates which relate to the earlier 9 August 2011 to 30 June 2011 using births, deaths and migration data.

Numerator:  Total population by broad age groups: 0-14, 15-24, 25-44, 45-64, 65+, 70+, 75+, 85+ years


Denominator:  Total population


Detail of analysis:  Per cent


Source:  Compiled by PHIDU based on the ABS Estimated Resident Population (ERP), 30 June 2015.


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