The size of Bulliac is approximately 58.1 square kilometres. The population of Bulliac in 2011 was 193 people. By 2016 the population was 35 showing a population decline of 81.9% in the area during that time. The predominant age group in Bulliac is 50-59 years. Households in Bulliac are primarily childless couples and are likely to be repaying $1800 - $2399 per month on mortgage repayments. In general, people in Bulliac work in a managers occupation. In 2011, 70.1% of the homes in Bulliac were owner-occupied compared with 94.1% in 2016.