The size of Calliope is approximately 16.7 square kilometres. The population of Calliope in 2011 was 408 people. By 2016 the population was 99 showing a population decline of 75.7% in the area during that time. The predominant age group in Calliope is 10-19 years. Households in Calliope are primarily couples with children and are likely to be repaying $1800 - $2399 per month on mortgage repayments. In general, people in Calliope work in a clerical occupation. In 2011, 65.8% of the homes in Calliope were owner-occupied compared with 61.8% in 2016.