The size of Biggs Flat is approximately 4.8 square kilometres. It has 1 park covering nearly 0.2% of total area. The population of Biggs Flat in 2011 was 206 people. By 2016 the population was 76 showing a population decline of 63.1% in the area during that time. The predominant age group in Biggs Flat is 10-19 years. Households in Biggs Flat are primarily couples with children and are likely to be repaying $1400 - $1799 per month on mortgage repayments. In general, people in Biggs Flat work in a managers occupation. In 2011, 88.5% of the homes in Biggs Flat were owner-occupied compared with 103.7% in 2016.