The size of Johnburgh is approximately 183.9 square kilometres. The population of Johnburgh in 2011 was 302 people. By 2016 the population was 6 showing a population decline of 98.0% in the area during that time. The predominant age group in Johnburgh is 50-59 years. Households in Johnburgh are primarily childless couples and are likely to be repaying under $300 per month on mortgage repayments. In general, people in Johnburgh work in a managers occupation. In 2006, 17% of the homes in Johnburgh were owner-occupied compared with 87.3% in 2011.