The size of Rockdale is approximately 2.4 square kilometres. It has 11 parks covering nearly 12.7% of total area. The population of Rockdale in 2011 was 14,035 people. By 2016 the population was 15,526 showing a population growth of 10.6% in the area during that time. The predominant age group in Rockdale is 20-29 years. Households in Rockdale are primarily couples with children and are likely to be repaying $1800 - $2399 per month on mortgage repayments. In general, people in Rockdale work in a professional occupation. In 2011, 55.1% of the homes in Rockdale were owner-occupied compared with 49.3% in 2016. Currently the median sales price of houses in the area is $1,155,000.