The size of Sinclair is approximately 1.5 square kilometres. The population of Sinclair in 2011 was 739 people. By 2016 the population was 877 showing a population growth of 18.7% in the area during that time. The predominant age group in Sinclair is 10-19 years. Households in Sinclair are primarily couples with children and are likely to be repaying $1400 - $1799 per month on mortgage repayments. In general, people in Sinclair work in a trades occupation. In 2011, 63.5% of the homes in Sinclair were owner-occupied compared with 66.4% in 2016. Currently the median sales price of houses in the area is $315,000.