The size of Wattle Flat is approximately 21.5 square kilometres. The population of Wattle Flat in 2011 was 1,018 people. By 2016 the population was 148 showing a population decline of 85.5% in the area during that time. The predominant age group in Wattle Flat is 10-19 years. Households in Wattle Flat are primarily couples with children and are likely to be repaying $1800 - $2399 per month on mortgage repayments. In general, people in Wattle Flat work in a clerical occupation. In 2011, 73.5% of the homes in Wattle Flat were owner-occupied compared with 102% in 2016.