The size of Newcastle is approximately 4.9 square kilometres. It has 18 parks covering nearly 7% of total area. The population of Newcastle in 2011 was 2,384 people. By 2016 the population was 2,752 showing a population growth of 15.4% in the area during that time. The predominant age group in Newcastle is 20-29 years. Households in Newcastle are primarily childless couples and are likely to be repaying $1800 - $2399 per month on mortgage repayments. In general, people in Newcastle work in a professional occupation. In 2011, 44.1% of the homes in Newcastle were owner-occupied compared with 45.7% in 2016. Currently the median sales price of houses in the area is $1,425,000.