The size of Walgoolan is approximately 528 square kilometres. It has 1 park covering nearly 0.2% of total area. The population of Walgoolan in 2011 was 277 people. By 2016 the population was 42 showing a population decline of 84.8% in the area during that time. The predominant age group in Walgoolan is 0-9 years. Households in Walgoolan are primarily childless couples and are likely to be repaying not stated per month on mortgage repayments. In general, people in Walgoolan work in a managers occupation. In 2006, 10% of the homes in Walgoolan were owner-occupied compared with 63.2% in 2011.