The size of Mount Barker is approximately 37.9 square kilometres. It has 37 parks covering nearly 6.9% of total area. The population of Mount Barker in 2016 was 13842 people. By 2021 the population was 18330 showing a population growth of 32.4% in the area during that time. The predominant age group in Mount Barker is 30-39 years. Households in Mount Barker are primarily couples with children and are likely to be repaying $1400 - $1799 per month on mortgage repayments. In general, people in Mount Barker work in a professional occupation.In 2021, 66.00% of the homes in Mount Barker were owner-occupied compared with 61.90% in 2016.
Mount Barker has 12,232 properties. Over the last 5 years, Houses in Mount Barker have seen a 82.76% increase in median value, while Units have seen a 124.37% increase. As at 31 October 2025:
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