The size of Long Flat is approximately 5.3 square kilometres. It has 2 parks covering nearly 0.7% of total area. The population of Long Flat in 2011 was 1,248 people. By 2016 the population was 73 showing a population decline of 94.2% in the area during that time. The predominant age group in Long Flat is 60-69 years. Households in Long Flat are primarily couples with children and are likely to be repaying $1000 - $1399 per month on mortgage repayments. In general, people in Long Flat work in a sales workers occupation. In 2011, 83.7% of the homes in Long Flat were owner-occupied compared with 64.5% in 2016.