The size of Dalyellup is approximately 16.5 square kilometres. It has 3 parks covering nearly 0.5% of total area. The population of Dalyellup in 2011 was 7,109 people. By 2016 the population was 9,005 showing a population growth of 26.7% in the area during that time. The predominant age group in Dalyellup is 10-19 years. Households in Dalyellup are primarily couples with children and are likely to be repaying $1800 - $2399 per month on mortgage repayments. In general, people in Dalyellup work in a professional occupation. In 2011, 69.3% of the homes in Dalyellup were owner-occupied compared with 67.9% in 2016. Currently the median sales price of houses in the area is $410,000.