The size of Rockbank is approximately 7.3 square kilometres. It has 1 park covering nearly 0.2% of total area. The population of Rockbank in 2011 was 1,349 people. By 2016 the population was 1,537 showing a population growth of 13.9% in the area during that time. The predominant age group in Rockbank is 40-49 years. Households in Rockbank are primarily couples with children and are likely to be repaying $1000 - $1399 per month on mortgage repayments. In general, people in Rockbank work in a machinery operators and drivers occupation. In 2011, 69.5% of the homes in Rockbank were owner-occupied compared with 63.6% in 2016. Currently the median sales price of houses in the area is $455,000.