The size of Dianella is approximately 10.8 square kilometres. It has 55 parks covering nearly 11.8% of total area. The population of Dianella in 2011 was 22,520 people. By 2016 the population was 23,498 showing a population growth of 4.3% in the area during that time. The predominant age group in Dianella is 40-49 years. Households in Dianella are primarily couples with children and are likely to be repaying $1800 - $2399 per month on mortgage repayments. In general, people in Dianella work in a professional occupation. In 2011, 72.1% of the homes in Dianella were owner-occupied compared with 72% in 2016. Currently the median sales price of houses in the area is $677,000.