The size of Oak Park is approximately 2.1 square kilometres. It has 11 parks covering nearly 13.3% of total area. The population of Oak Park in 2011 was 5,772 people. By 2016 the population was 6,205 showing a population growth of 7.5% in the area during that time. The predominant age group in Oak Park is 30-39 years. Households in Oak Park are primarily couples with children and are likely to be repaying $1800 - $2399 per month on mortgage repayments. In general, people in Oak Park work in a professional occupation. In 2011, 74.2% of the homes in Oak Park were owner-occupied compared with 69.6% in 2016. Currently the median sales price of houses in the area is $1,130,000.