The size of Harrison is approximately 2.9 square kilometres. It has 4 parks covering nearly 1.3% of total area. The population of Harrison in 2011 was 4,440 people. By 2016 the population was 7,698 showing a population growth of 73.4% in the area during that time. The predominant age group in Harrison is 30-39 years. Households in Harrison are primarily couples with children and are likely to be repaying $1800 - $2399 per month on mortgage repayments. In general, people in Harrison work in a professional occupation. In 2011, 62.3% of the homes in Harrison were owner-occupied compared with 55.1% in 2016. Currently the median sales price of houses in the area is $965,000.