The size of Shellharbour is approximately 2.4 square kilometres. It has 12 parks covering nearly 28.9% of total area. The population of Shellharbour in 2011 was 3,326 people. By 2016 the population was 3,550 showing a population growth of 6.7% in the area during that time. The predominant age group in Shellharbour is 50-59 years. Households in Shellharbour are primarily couples with children and are likely to be repaying $1800 - $2399 per month on mortgage repayments. In general, people in Shellharbour work in a professional occupation. In 2011, 67.8% of the homes in Shellharbour were owner-occupied compared with 65.1% in 2016. Currently the median sales price of houses in the area is $1,110,000.