The size of Roundstone is approximately 813.8 square kilometres. It has 11 parks covering nearly 11.3% of total area. The population of Roundstone in 2011 was 361 people. By 2016 the population was 38 showing a population decline of 89.5% in the area during that time. The predominant age group in Roundstone is 30-39 years. Households in Roundstone are primarily couples with children and are likely to be repaying under $300 per month on mortgage repayments. In general, people in Roundstone work in a managers occupation. In 2006, 17.4% of the homes in Roundstone were owner-occupied compared with 42.2% in 2011.