The size of Killara is approximately 4.6 square kilometres. It has 15 parks covering nearly 8.2% of total area. The population of Killara in 2011 was 9,284 people. By 2016 the population was 10,582 showing a population growth of 14.0% in the area during that time. The predominant age group in Killara is 10-19 years. Households in Killara are primarily couples with children and are likely to be repaying over $4000 per month on mortgage repayments. In general, people in Killara work in a professional occupation. In 2011, 77.3% of the homes in Killara were owner-occupied compared with 74.3% in 2016. Currently the median sales price of houses in the area is $4,214,000.