Australia's population grew by 316,000 people (1.4 per cent) to reach 23.7 million by the end of March 2015.
Net overseas migration contributed 173,100 people to the population (16 per cent lower than the previous year), and accounted for 55 per cent of Australia's total population growth.
"The Northern Territory recorded its lowest growth rate in 11 years, at 0.2 per cent for the year ending March 2015 which is 80 per cent lower than that of March 2014.
Western Australia also recorded slower growth. In the past two years, net overseas migration to the state has dropped by 71 per cent, while net interstate migration has dropped to the point where the state has seen a net interstate loss.
The states of Victoria and Queensland were the only states recording a net gain from interstate migration. Victoria continues to have the fastest population growth rate in the country, growing by 1.7 per cent (97,500 people).
Over the year, natural increase contributed 142,900 people to Australia's population, made up of 298,400