The size of Mount Barney is approximately 82.6 square kilometres. It has 5 parks covering nearly 73.9% of total area. The population of Mount Barney in 2016 was 22 people. By 2021 the population was 46 showing a population growth of 109.1% in the area during that time. The predominant age group in Mount Barney is 10-19 years. Households in Mount Barney are primarily childless couples and are likely to be repaying $3000 - $3999 per month on mortgage repayments. In general, people in Mount Barney work in a community and personal service occupation.In 2021, 43.80% of the homes in Mount Barney were owner-occupied compared with 133.30% in 2016.
Mount Barney has 19 properties. Over the last 5 years, Houses in Mount Barney have seen a 18.17% increase in median value. As at 31 October 2025:
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