The size of Hillside is approximately 8.2 square kilometres. It has 21 parks covering nearly 5% of total area. The population of Hillside in 2011 was 16,326 people. By 2016 the population was 17,052 showing a population growth of 4.4% in the area during that time. The predominant age group in Hillside is 40-49 years. Households in Hillside are primarily couples with children and are likely to be repaying $1800 - $2399 per month on mortgage repayments. In general, people in Hillside work in a clerical occupation. In 2011, 83.3% of the homes in Hillside were owner-occupied compared with 83% in 2016. Currently the median sales price of houses in the area is $730,000.