While a newborn traditionally marked population milestones, new migrants have driven Australia's population growth in recent years.
Australia's population has clicked over to 24-million.
The Australian Bureau of Statistics says the milestone came just before 1am Australian Eastern Standard Time and follows record net overseas migration, which made up 53 per cent of Australia's population increase in the year before July 2015.
Australia's population increases by one person every one minute and 31 seconds, and has grown by one million people every three years since 2004.
Former foreign minister Bob Carr says Australia's population growth is flooding major cities and putting huge pressure on house
prices.
The Australian Bureau of Statistics says Australia's population ticked over to 24 million overnight, with the population increasing by one person every one minute and 31 seconds.
Statistics show the population has grown by one million people every three years since 2004.
Mr Carr says Australia has the highest rate of population growth of any developed country.
