The size of Moonyoonooka is approximately 158.8 square kilometres. It has 3 parks covering nearly 0.4% of total area. The population of Moonyoonooka in 2011 was 307 people. By 2016 the population was 239 showing a population decline of 22.1% in the area during that time. The predominant age group in Moonyoonooka is 50-59 years. Households in Moonyoonooka are primarily couples with children and are likely to be repaying $1000 - $1399 per month on mortgage repayments. In general, people in Moonyoonooka work in a managers occupation. In 2011, 78.9% of the homes in Moonyoonooka were owner-occupied compared with 80.4% in 2016.