The size of Southern River is approximately 14 square kilometres. It has 6 parks covering nearly 0.8% of total area. The population of Southern River in 2011 was 5,984 people. By 2016 the population was 10,348 showing a population growth of 72.9% in the area during that time. The predominant age group in Southern River is 30-39 years. Households in Southern River are primarily couples with children and are likely to be repaying $1800 - $2399 per month on mortgage repayments. In general, people in Southern River work in a professional occupation. In 2011, 84.3% of the homes in Southern River were owner-occupied compared with 82.3% in 2016. Currently the median sales price of houses in the area is $570,000.