The size of Mount Barker is approximately 37.9 square kilometres. It has 80 parks covering nearly 5.7% of total area. The population of Mount Barker in 2011 was 11,808 people. By 2016 the population was 13,836 showing a population growth of 17.2% in the area during that time. The predominant age group in Mount Barker is 0-9 years. Households in Mount Barker are primarily couples with children and are likely to be repaying $1800 - $2399 per month on mortgage repayments. In general, people in Mount Barker work in a professional occupation. In 2011, 63% of the homes in Mount Barker were owner-occupied compared with 61.9% in 2016. Currently the median sales price of houses in the area is $480,000.