Which region if Australia has the most population?

The region of Australia with the most population is New South Wales (NSW). NSW is located in the southeastern part of the country and is home to Sydney, the largest city in Australia. As of 2021, NSW had a population of over 8.1 million people, which is around a third of the country's total population. The population of NSW is concentrated in the Sydney metropolitan area, which includes the greater Sydney area as well as the Central Coast and Blue Mountains regions.