The size of Wanneroo is approximately 20.1 square kilometres. It has 18 parks covering nearly 8.8% of total area. The population of Wanneroo in 2011 was 11,900 people. By 2016 the population was 12,062 showing a population growth of 1.4% in the area during that time. The predominant age group in Wanneroo is 30-39 years. Households in Wanneroo are primarily couples with children and are likely to be repaying $1800 - $2399 per month on mortgage repayments. In general, people in Wanneroo work in a trades occupation. In 2011, 75.1% of the homes in Wanneroo were owner-occupied compared with 74.9% in 2016. Currently the median sales price of houses in the area is $435,000.