The size of Wollumboola is approximately 35 square kilometres. It has 4 parks covering nearly 59.6% of total area. The population of Wollumboola in 2011 was 74 people. By 2016 the population was 12 showing a population decline of 83.8% in the area during that time. The predominant age group in Wollumboola is 60-69 years. Households in Wollumboola are primarily couples with children and are likely to be repaying $450 - $599 per month on mortgage repayments. In general, people in Wollumboola work in a clerical occupation. In 2006, 23.7% of the homes in Wollumboola were owner-occupied compared with 60% in 2011.