The size of Bullio is approximately 90.1 square kilometres. It has 4 parks covering nearly 24.3% of total area. The population of Bullio in 2011 was 474 people. By 2016 the population was 81 showing a population decline of 82.9% in the area during that time. The predominant age group in Bullio is 50-59 years. Households in Bullio are primarily couples with children and are likely to be repaying $2400 - $2999 per month on mortgage repayments. In general, people in Bullio work in a trades occupation. In 2011, 88.3% of the homes in Bullio were owner-occupied compared with 73.1% in 2016.