The size of Woolumbool is approximately 361.4 square kilometres. It has 1 park covering nearly 3.9% of total area. The population of Woolumbool in 2011 was 978 people. By 2016 the population was 46 showing a population decline of 95.3% in the area during that time. The predominant age group in Woolumbool is 50-59 years. Households in Woolumbool are primarily childless couples and are likely to be repaying $1000 - $1399 per month on mortgage repayments. In general, people in Woolumbool work in a managers occupation. In 2011, 70.3% of the homes in Woolumbool were owner-occupied compared with 36.3% in 2016.