The size of Casey is approximately 2.6 square kilometres. It has 16 parks covering nearly 31.2% of total area. The population of Casey in 2011 was 1,490 people. By 2016 the population was 5,752 showing a population growth of 286.0% in the area during that time. The predominant age group in Casey is 30-39 years. Households in Casey are primarily couples with children and are likely to be repaying $1800 - $2399 per month on mortgage repayments. In general, people in Casey work in a professional occupation. In 2011, 74.5% of the homes in Casey were owner-occupied compared with 72.2% in 2016. Currently the median sales price of houses in the area is $775,000.