The size of Hynam is approximately 150.1 square kilometres. The population of Hynam in 2011 was 656 people. By 2016 the population was 120 showing a population decline of 81.7% in the area during that time. The predominant age group in Hynam is 0-9 years. Households in Hynam are primarily childless couples and are likely to be repaying $1000 - $1399 per month on mortgage repayments. In general, people in Hynam work in a managers occupation. In 2011, 74.7% of the homes in Hynam were owner-occupied compared with 81.2% in 2016.