The size of Jack River is approximately 49.6 square kilometres. The population of Jack River in 2011 was 300 people. By 2016 the population was 114 showing a population decline of 62.0% in the area during that time. The predominant age group in Jack River is 60-69 years. Households in Jack River are primarily couples with children and are likely to be repaying $1800 - $2399 per month on mortgage repayments. In general, people in Jack River work in a managers occupation. In 2011, 73.6% of the homes in Jack River were owner-occupied compared with 66.1% in 2016.