The size of Monogorilby is approximately 201.8 square kilometres. It has 2 parks covering nearly 0.2% of total area. The population of Monogorilby in 2011 was 234 people. By 2016 the population was 46 showing a population decline of 80.3% in the area during that time. The predominant age group in Monogorilby is 10-19 years. Households in Monogorilby are primarily couples with children and are likely to be repaying $300 - $449 per month on mortgage repayments. In general, people in Monogorilby work in a managers occupation. In 2011, 59.7% of the homes in Monogorilby were owner-occupied compared with 53.3% in 2016.