The size of Cortlinye is approximately 311 square kilometres. It has 2 parks covering nearly 1.6% of total area. The population of Cortlinye in 2011 was 478 people. By 2016 the population was 44 showing a population decline of 90.8% in the area during that time. The predominant age group in Cortlinye is 0-9 years. Households in Cortlinye are primarily couples with children and are likely to be repaying under $300 per month on mortgage repayments. In general, people in Cortlinye work in a managers occupation. In 2011, 76.9% of the homes in Cortlinye were owner-occupied compared with 69.3% in 2016.