The size of Stuart Mill is approximately 150.5 square kilometres. It has 3 parks covering nearly 10% of total area. The population of Stuart Mill in 2011 was 395 people. By 2016 the population was 58 showing a population decline of 85.3% in the area during that time. The predominant age group in Stuart Mill is 60-69 years. Households in Stuart Mill are primarily childless couples and are likely to be repaying under $300 per month on mortgage repayments. In general, people in Stuart Mill work in a managers occupation. In 2011, 88.4% of the homes in Stuart Mill were owner-occupied compared with 87.9% in 2016.