The size of Cornwall is approximately 5.4 square kilometres. It has 5 parks covering nearly 48.5% of total area. The population of Cornwall in 2011 was 800 people. By 2016 the population was 50 showing a population decline of 93.8% in the area during that time. The predominant age group in Cornwall is 60-69 years. Households in Cornwall are primarily childless couples and are likely to be repaying $300 - $449 per month on mortgage repayments. In general, people in Cornwall work in a labourer occupation. In 2011, 76.6% of the homes in Cornwall were owner-occupied compared with 103.8% in 2016. Currently the median sales price of houses in the area is $54,000.