The size of Hart is approximately 18,148.3 square kilometres. It has 1 park covering nearly 1% of total area. The population of Hart in 2011 was 386 people. By 2016 the population was 162 showing a population decline of 58.0% in the area during that time. The predominant age group in Hart is 0-9 years. Households in Hart are primarily couples with children and are likely to be repaying not stated per month on mortgage repayments. In general, people in Hart work in a labourer occupation. In 2006, 20.5% of the homes in Hart were owner-occupied compared with 15.8% in 2011.