The size of Melville is approximately 5.6 square kilometres. The population of Melville in 2011 was 173 people. By 2016 the population was 42 showing a population decline of 75.7% in the area during that time. The predominant age group in Melville is 0-9 years. Households in Melville are primarily childless couples and are likely to be repaying over $4000 per month on mortgage repayments. In general, people in Melville work in a managers occupation. In 2011, 92.2% of the homes in Melville were owner-occupied compared with 96% in 2016.