The size of Isla is approximately 845.4 square kilometres. It has 18 parks covering nearly 11.1% of total area. The population of Isla in 2011 was 248 people. By 2016 the population was 157 showing a population decline of 36.7% in the area during that time. The predominant age group in Isla is 40-49 years. Households in Isla are primarily couples with children and are likely to be repaying under $300 per month on mortgage repayments. In general, people in Isla work in a managers occupation. In 2011, 76.4% of the homes in Isla were owner-occupied compared with 66.7% in 2016.