The size of Prestons is approximately 9.2 square kilometres. It has 14 parks covering nearly 3.2% of total area. The population of Prestons in 2011 was 14,419 people. By 2016 the population was 15,333 showing a population growth of 6.3% in the area during that time. The predominant age group in Prestons is 10-19 years. Households in Prestons are primarily couples with children and are likely to be repaying $1800 - $2399 per month on mortgage repayments. In general, people in Prestons work in a professional occupation. In 2011, 82.6% of the homes in Prestons were owner-occupied compared with 79.6% in 2016. Currently the median sales price of houses in the area is $910,000.