The size of Alpana is approximately 173 square kilometres. The population of Alpana in 2011 was 493 people. By 2016 the population was 23 showing a population decline of 95.3% in the area during that time. The predominant age group in Alpana is 50-59 years. Households in Alpana are primarily childless couples and are likely to be repaying under $300 per month on mortgage repayments. In general, people in Alpana work in a managers occupation. In 2011, 56.4% of the homes in Alpana were owner-occupied compared with 100% in 2016.