The size of Clayton is approximately 7.9 square kilometres. It has 5 parks covering nearly 1.6% of total area. The population of Clayton in 2011 was 15,543 people. By 2016 the population was 19,348 showing a population growth of 24.5% in the area during that time. The predominant age group in Clayton is 20-29 years. Households in Clayton are primarily couples with children and are likely to be repaying $1800 - $2399 per month on mortgage repayments. In general, people in Clayton work in a professional occupation. In 2011, 40.2% of the homes in Clayton were owner-occupied compared with 35.2% in 2016. Currently the median sales price of houses in the area is $1,264,000.