The size of Coomunga is approximately 59.8 square kilometres. It has 1 park. The population of Coomunga in 2011 was 351 people. By 2016 the population was 113 showing a population decline of 67.8% in the area during that time. The predominant age group in Coomunga is 10-19 years. Households in Coomunga are primarily couples with children and are likely to be repaying $1400 - $1799 per month on mortgage repayments. In general, people in Coomunga work in a professional occupation. In 2011, 76.6% of the homes in Coomunga were owner-occupied compared with 74.3% in 2016.