Melbourne is set to overtake Sydney as Australia's biggest city after the state's population topped the 6 million mark.

Fuelled by a surge in overseas and interstate migration, Victoria grew by 1.9 per cent from March 2015 to 2016.

While overseas migrants are the biggest contributors to Australia's growth, demographers say Victoria's population has been boosted by people leaving northern states in search of employment.

More than 14,000 people moved from interstate to Victoria over the past 12 months, according to the Australian Bureau of Statistics (ABS).

A contributing factor has been the slowdown of the Queensland economy since the end of the mining boom and the strength of the Victorian economy.

Victoria's growth shows no signs of slowing with the Australian Bureau of Statistics (ABS) predicting Victoria's population will reach 7 million by 2024.

Demographers say that population growth comes down to jobs. People go where the jobs are.

Overall, Australia's population grew by 1.4 per cent from March 2015 to 2016 – the equivalent of 327,600 people. Australia's population stands at 24,195,823.