The size of Garradunga is approximately 8.1 square kilometres. The population of Garradunga in 2011 was 329 people. By 2016 the population was 131 showing a population decline of 60.2% in the area during that time. The predominant age group in Garradunga is 50-59 years. Households in Garradunga are primarily couples with children and are likely to be repaying $1800 - $2399 per month on mortgage repayments. In general, people in Garradunga work in a managers occupation. In 2011, 82.9% of the homes in Garradunga were owner-occupied compared with 94.8% in 2016.