The size of Mordialloc is approximately 4.4 square kilometres. It has 8 parks covering nearly 7.1% of total area. The population of Mordialloc in 2011 was 7,536 people. By 2016 the population was 8,160 showing a population growth of 8.3% in the area during that time. The predominant age group in Mordialloc is 40-49 years. Households in Mordialloc are primarily couples with children and are likely to be repaying $1800 - $2399 per month on mortgage repayments. In general, people in Mordialloc work in a professional occupation. In 2011, 67.7% of the homes in Mordialloc were owner-occupied compared with 66.2% in 2016. Currently the median sales price of houses in the area is $1,389,000.