The size of Kardinya is approximately 4.4 square kilometres. It has 19 parks covering nearly 10.3% of total area. The population of Kardinya in 2011 was 8,793 people. By 2016 the population was 8,718 showing a population decline of 0.9% in the area during that time. The predominant age group in Kardinya is 20-29 years. Households in Kardinya are primarily couples with children and are likely to be repaying $1800 - $2399 per month on mortgage repayments. In general, people in Kardinya work in a professional occupation. In 2011, 78.5% of the homes in Kardinya were owner-occupied compared with 77.3% in 2016. Currently the median sales price of houses in the area is $725,000.