Sydney and Melbourne saw a record population increase of 310,000 in a year, fueled by the return of international students post-COVID-19.

Melbourne's growth of 166,000 and Sydney's 142,600 mark the first time both cities added over 140,000 residents in a single year.

The population boost was significantly influenced by migrants moving into inner city areas and student accommodations.

Without international migrants, Sydney's population would have declined, while Melbourne's natural population growth remained positive.

The trend of declining major-city population during the pandemic has reversed, with regional centers like Geelong also seeing rapid growth.

Suburban expansion continues with areas like Armstrong Creek drawing new residents, while Perth and Brisbane grew by 80,000 and 78,000 respectively.

Since 2000, popular regions like the Gold Coast and Sunshine Coast have expanded by over 70%.

Rapid urban development raises concerns about the scarcity of green spaces in new suburbs.