The size of Firle is approximately 0.6 square kilometres. It has 8 parks covering nearly 4.8% of total area. The population of Firle in 2011 was 1,432 people. By 2016 the population was 1,449 showing a population growth of 1.2% in the area during that time. The predominant age group in Firle is 20-29 years. Households in Firle are primarily couples with children and are likely to be repaying $1800 - $2399 per month on mortgage repayments. In general, people in Firle work in a professional occupation. In 2011, 61.5% of the homes in Firle were owner-occupied compared with 60.4% in 2016. Currently the median sales price of houses in the area is $875,000.