The most recent data from the Australian Bureau of Statistics (ABS) assumes that on average, Australia's population increases by one person every 83 seconds.
According to the Bureau, Australia’s population grew by 1.6 per cent over 2017.
That's higher than the global population, which a United Nations report estimates grew by 1.1 per cent.
Professor Nick Parr, a Professor of Demography at Macquarie University, says Australia is experiencing relatively high population growth for a country of its kind.
"Our population growth was 1.6 per cent -- that's higher than the population growth rate for the total population of the world, according to UN estimates. By world standards we have a relatively rapidly growing population, and this is quite unusual for a more developed country."
World Bank data suggest most countries with high population growth are developing nations, where access to sex education and birth control is limited.
The figures show the countries that experienced the highest population growth in 2017 - between 4.5 and 5 per cent - were Oman (with a 4.7 per cent increase), Bahrain (4.6) and Nauru (4.5).
But Dr Liz Allen, a Demographer at the Australian National University Centre for Social Research and Methods, argues people too often fixate on population size and growth.
She says there are other factors that need to be considered.
"Higher population growth on a lower population base like Australia delivers a different rate of change in size, than say a small rate of growth on a very large population, like the US. If we look to other indicators of population comparisons, the population density in Australia is behind that of similar countries.”
Over the last three years, Australia’s overall population has grown by around 400,000 per annum.
If this trend continues, the Bureau of Statistics projects it could hit 26 million as early as 2020, 30 million in 2030 and 40 million in 2048.
Australia's 25-million milestone comes amid concerns infrastructure in some of Australia’s biggest cities, particularly in those along the east coast, is being put under pressure by the growing population.
Dr Liz Allen says there’s plenty of room for new Australians, and migrants in particular, away from the east coast and in regional areas.
She says many regional areas are looking for skilled migrants and population growth.
“Migrants fill positions that locals are either not adequately skilled for or do not want to take. The type of people who move countries are highly innovative people, are very entrepreneurial. This is something that Australia should capitalise on. People risk a lot to move countries and it’s that measured risk-taking that builds nations.”
But keeping people in regional areas is easier said than done and, according to some, unfair.
In July the Turnbull government said it look at ways to bind migrants to rural areas, perhaps under visa conditions.
That followed data from Home Affairs claiming one skilled migrant in every 10, after settling in regional areas, moved to a city within 18 months.
Professor Nick Parr says Australia should be able to cope with sustained population growth for the foreseeable future, but admits it's a new situation.
"The problem we face at the moment is that we don’t really have a successful model for successfully settling large numbers of migrants away from the major cities. That's something that really needs research and experimentation. We need to find a way. But it’s not clear how we can achieve that at the current point in time."
Demographic researcher Mark McCrindle says better planning is the answer.
"It's not about population as much as it’s about responding to the trends. It’s about planning for the growth. If we look at New South Wales, Victoria, and Queensland as well, in the last decade they’ve responded to the new growth realities and put a lot of investment in place. We've played a bit of catch-up but we're getting on top of it at the moment.”
Australia has the 53rd-largest population in the world, one place behind North Korea and one place ahead of Côte d’Ivoire.
Australia’s population accounts for 0.33 per cent - that’s one third of one per cent - of the world's people.
