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Willunga and Surrounds

Estimated Resident Population (ERP)

The official population of Willunga and Surrounds as of the 30th June 2015, is 3,630.

The Estimated Resident Population is the OFFICIAL City of Onkaparinga population for 2015. For areas within the City of Onkaparinga, the ERP is not an official count but an experimental estimate which is subject to review after the next Census.

Populations are counted and estimated in various ways. The most comprehensive population count available in Australia is derived from the Census of Population and Housing conducted by the Australian Bureau of Statistics every five years. However the Census count is generally an under-estimate of the actual population, due to people missed in the Census and people overseas on Census night. To provide a more accurate population figure which is updated more frequently than every five years, the Australian Bureau of Statistics also produces "Estimated Resident Population" (ERP) numbers for the City of Onkaparinga. Estimates for areas within the City of Onkaparinga are based on aggregates of SA1s derived from population distributions applicable at the 2011 Census. Actual populations may vary slightly where population growth has not been uniform since the previous Census.

See data notes for a detailed explanation of different population types, how they are calculated and when to use each one.

Estimated Resident Population (ERP)
Willunga and Surrounds
Year (ending June 30)NumberChange in numberChange in percent
20113,567----
20123,580+13+0.36
20133,594+14+0.39
20143,625+31+0.86
20153,630+5+0.14

Source: Australian Bureau of Statistics, Regional Population Growth, Australia (3218.0). Compiled and presented in profile.id by .id , the population experts.

Estimated Resident Population (ERP)
Estimated Resident Population (ERP) 2015, City of Onkaparinga: 3,630 2014, City of Onkaparinga: 3,625 2013, City of Onkaparinga: 3,594 2012, City of Onkaparinga: 3,580 2011, City of Onkaparinga: 3,567
Source: Australian Bureau of Statistics, Regional Population Growth, Australia (3218.0). Compiled and presented by .id the population experts
Annual change in Estimated Resident Population (ERP)
Annual change in Estimated Resident Population (ERP) 2015, Percentage change: +0.1% 2014, Percentage change: +0.9% 2013, Percentage change: +0.4% 2015, Change in number: +5 2014, Change in number: +31 2013, Change in number: +14 2012, Change in number: +13
Source: Australian Bureau of Statistics, Regional Population Growth, Australia (3218.0). Compiled and presented by .id the population experts