The size of Killara is approximately 1.7 square kilometres. It has 1 park covering nearly 7.2% of total area. The population of Killara in 2011 was 583 people. By 2016 the population was 624 showing a population growth of 7.0% in the area during that time. The predominant age group in Killara is 30-39 years. Households in Killara are primarily couples with children and are likely to be repaying $1800 - $2399 per month on mortgage repayments. In general, people in Killara work in a trades occupation. In 2011, 62.1% of the homes in Killara were owner-occupied compared with 71.7% in 2016. Currently the median sales price of houses in the area is $479,500.