The size of Flagstaff Hill is approximately 8.5 square kilometres. It has 21 parks covering nearly 27.1% of total area. The population of Flagstaff Hill in 2011 was 9,850 people. By 2016 the population was 9,952 showing a population growth of 1.0% in the area during that time. The predominant age group in Flagstaff Hill is 50-59 years. Households in Flagstaff Hill are primarily couples with children and are likely to be repaying $1800 - $2399 per month on mortgage repayments. In general, people in Flagstaff Hill work in a professional occupation. In 2011, 87.7% of the homes in Flagstaff Hill were owner-occupied compared with 88% in 2016. Currently the median sales price of houses in the area is $657,500.