The size of Longlea is approximately 58.7 square kilometres. The population of Longlea in 2011 was 493 people. By 2016 the population was 502 showing a population growth of 1.8% in the area during that time. The predominant age group in Longlea is 50-59 years. Households in Longlea are primarily couples with children and are likely to be repaying $1400 - $1799 per month on mortgage repayments. In general, people in Longlea work in a professional occupation. In 2011, 90.9% of the homes in Longlea were owner-occupied compared with 88.2% in 2016.