The size of Newcastle Waters is approximately 2.6 square kilometres. The population of Newcastle Waters in 2011 was 156 people. By 2016 the population was 56 showing a population decline of 64.1% in the area during that time. The predominant age group in Newcastle Waters is 0-9 years. Households in Newcastle Waters are primarily couples with children and are likely to be repaying under $300 per month on mortgage repayments. In general, people in Newcastle Waters work in a labourer occupation. In 2006, 31.6% of the homes in Newcastle Waters were owner-occupied compared with 31.6% in 2011.