2901.0 - Census Dictionary, 2011
ARCHIVED ISSUE Released at 11:30 AM (CANBERRA TIME) 23/05/2011
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Estimated Resident Population (ERP)
The Estimated Resident Population (ERP) is the official measure of the population of Australia, and is based on the concept of usual residence. It refers to all people, regardless of nationality, citizenship or legal status, who usually live in Australia, with the exception of foreign diplomatic personnel and their families. The ERP includes usual residents who are overseas for less than 12 months and excludes overseas visitors who are in Australia for less then 12 months.
In the Census year, the ERP is first calculated at the Census date (9 August for the 2011 Census), and is then backdated to calculate the ERP at 30 June of the Census year. After each Census, estimates for the preceding intercensal period are revised to ensure that the total intercensal increase agrees with the difference between the estimated resident populations at the two 30 June dates in the respective Census years.
In the compilation of the 30 June ERP for a Census year, three important adjustments are made to the Census count based on Place of usual residence.
The ERP by age and sex is published annually at national, state, LGA and SA2 level. The ERP by country of birth is also published annually at a national level. National and state/territory ERP, by sex, is published quarterly.
More information on the ERP can be found in the ABS publication Australian Demographic Statistics (cat. no. 3101.0), produced quarterly. ERPs for SLAs (to 2011), SA2s (from 2011 onwards with some back-casting for previous years) and LGAs are published in Regional Population Growth, Australia (cat. no. 3218.0). More information on demographic publications is available under Topics @ a Glance/Demography.
See also Census counts, Place of enumeration, Place of Usual Residence (PURP).