The size of Willetton is approximately 8.7 square kilometres. It has 31 parks covering nearly 9.1% of total area. The population of Willetton in 2011 was 17,391 people. By 2016 the population was 18,171 showing a population growth of 4.5% in the area during that time. The predominant age group in Willetton is 10-19 years. Households in Willetton are primarily couples with children and are likely to be repaying $1800 - $2399 per month on mortgage repayments. In general, people in Willetton work in a professional occupation. In 2011, 80.4% of the homes in Willetton were owner-occupied compared with 78.5% in 2016. Currently the median sales price of houses in the area is $820,000.