The size of Coffin Bay is approximately 360.9 square kilometres. It has 10 parks covering nearly 85.8% of total area. The population of Coffin Bay in 2011 was 613 people. By 2016 the population was 613 showing a stable population in the area during that time. The predominant age group in Coffin Bay is 60-69 years. Households in Coffin Bay are primarily childless couples and are likely to be repaying $1000 - $1399 per month on mortgage repayments. In general, people in Coffin Bay work in a managers occupation. In 2011, 77.4% of the homes in Coffin Bay were owner-occupied compared with 79.5% in 2016. Currently the median sales price of houses in the area is $407,500.