The size of Wahroonga is approximately 9.7 square kilometres. It has 30 parks covering nearly 9.4% of total area. The population of Wahroonga in 2011 was 16,725 people. By 2016 the population was 17,348 showing a population growth of 3.7% in the area during that time. The predominant age group in Wahroonga is 10-19 years. Households in Wahroonga are primarily couples with children and are likely to be repaying over $4000 per month on mortgage repayments. In general, people in Wahroonga work in a professional occupation. In 2011, 80.3% of the homes in Wahroonga were owner-occupied compared with 80.6% in 2016. Currently the median sales price of houses in the area is $2,216,500.