The size of Mount Light is approximately 51.6 square kilometres. It has 2 parks covering nearly 0.5% of total area. The population of Mount Light in 2011 was 656 people. By 2016 the population was 137 showing a population decline of 79.1% in the area during that time. The predominant age group in Mount Light is 0-9 years. Households in Mount Light are primarily couples with children and are likely to be repaying $1800 - $2399 per month on mortgage repayments. In general, people in Mount Light work in a managers occupation. In 2011, 74.7% of the homes in Mount Light were owner-occupied compared with 96.3% in 2016.