The size of Wantirna South is approximately 14.1 square kilometres. It has 33 parks covering nearly 12.9% of total area. The population of Wantirna South in 2011 was 17,477 people. By 2016 the population was 19,288 showing a population growth of 10.4% in the area during that time. The predominant age group in Wantirna South is 50-59 years. Households in Wantirna South are primarily couples with children and are likely to be repaying $1800 - $2399 per month on mortgage repayments. In general, people in Wantirna South work in a professional occupation. In 2011, 79.4% of the homes in Wantirna South were owner-occupied compared with 75.3% in 2016. Currently the median sales price of houses in the area is $1,200,000.