The size of Deer Park is approximately 8.6 square kilometres. It has 21 parks covering nearly 8.2% of total area. The population of Deer Park in 2011 was 16,204 people. By 2016 the population was 18,121 showing a population growth of 11.8% in the area during that time. The predominant age group in Deer Park is 30-39 years. Households in Deer Park are primarily couples with children and are likely to be repaying $1800 - $2399 per month on mortgage repayments. In general, people in Deer Park work in a labourer occupation. In 2011, 67.1% of the homes in Deer Park were owner-occupied compared with 66.3% in 2016. Currently the median sales price of houses in the area is $600,000.