The size of Smithfield is approximately 13.1 square kilometres. It has 25 parks covering nearly 22.8% of total area. The population of Smithfield in 2011 was 3,707 people. By 2016 the population was 5,304 showing a population growth of 43.1% in the area during that time. The predominant age group in Smithfield is 20-29 years. Households in Smithfield are primarily couples with children and are likely to be repaying $1800 - $2399 per month on mortgage repayments. In general, people in Smithfield work in a professional occupation. In 2011, 63.7% of the homes in Smithfield were owner-occupied compared with 63.3% in 2016. Currently the median sales price of houses in the area is $505,000.