The size of Barbalin is approximately 165.5 square kilometres. It has 10 parks covering nearly 5.5% of total area. The population of Barbalin in 2011 was 492 people. By 2016 the population was 6 showing a population decline of 98.8% in the area during that time. The predominant age group in Barbalin is 0-9 years. Households in Barbalin are primarily childless couples and are likely to be repaying under $300 per month on mortgage repayments. In general, people in Barbalin work in a managers occupation. In 2006, 11.1% of the homes in Barbalin were owner-occupied compared with 68.7% in 2011.