The size of Willangie is approximately 156.9 square kilometres. The population of Willangie in 2011 was 320 people. By 2016 the population was 24 showing a population decline of 92.5% in the area during that time. The predominant age group in Willangie is 50-59 years. Households in Willangie are primarily childless couples and are likely to be repaying under $300 per month on mortgage repayments. In general, people in Willangie work in a managers occupation. In 2011, 79.5% of the homes in Willangie were owner-occupied compared with 73.3% in 2016.