The size of Alpine is approximately 22.6 square kilometres. It has 5 parks covering nearly 61.2% of total area. The population of Alpine in 2011 was 1,718 people. By 2016 the population was 139 showing a population decline of 91.9% in the area during that time. The predominant age group in Alpine is 10-19 years. Households in Alpine are primarily couples with children and are likely to be repaying $1400 - $1799 per month on mortgage repayments. In general, people in Alpine work in a professional occupation. In 2011, 78.4% of the homes in Alpine were owner-occupied compared with 110.5% in 2016.