The size of Binnum is approximately 177.9 square kilometres. The population of Binnum in 2011 was 532 people. By 2016 the population was 62 showing a population decline of 88.3% in the area during that time. The predominant age group in Binnum is 50-59 years. Households in Binnum are primarily couples with children and are likely to be repaying under $300 per month on mortgage repayments. In general, people in Binnum work in a managers occupation. In 2011, 78% of the homes in Binnum were owner-occupied compared with 62.9% in 2016.