Australia's estimated resident population (ERP) reached 22.3 million at 30 June 2011, increasing by 2.9 million people or 15% since 30 June 2001.All states and territories experienced population growth between 2001 and 2011, with the largest increases in Australia's three most populous states.
Queensland had the greatest growth (up by 845,200 people), followed by Victoria (729,800) and New South Wales (636,300). Western Australia had the fastest growth, increasing by 24% in the ten years to 2011, followed by Queensland (23%) and the Northern Territory (17%). Victoria and the Australian Capital Territory grew by 15%, equal to Australia.
The remaining states all had growth below the Australian average, with New South Wales at 10% and South Australia and Tasmania both at 8%.Population growth between 2001 and 2011 was most prominent in outer suburbs, the inner-city, urban infill areas and along the coast. Areas that have seen decline include inland, rural areas that have been affected by drought and well-established suburbs within capital cities, as can be seen in the following map which shows the population change of Statistical Areas Level 2 (SA2s) over this period.