The size of Ranken is approximately 19,845.7 square kilometres. It has 6 parks covering nearly 0.7% of total area. The population of Ranken in 2011 was 282 people. By 2016 the population was 34 showing a population decline of 87.9% in the area during that time. The predominant age group in Ranken is 20-29 years. Households in Ranken are primarily childless couples and are likely to be repaying $950 - $1199 per month on mortgage repayments. In general, people in Ranken work in a labourer occupation. In 2006, 20.5% of the homes in Ranken were owner-occupied compared with 12.3% in 2011.