The size of Mount Moriac is approximately 40.6 square kilometres. The population of Mount Moriac in 2011 was 255 people. By 2016 the population was 238 showing a population decline of 6.7% in the area during that time. The predominant age group in Mount Moriac is 50-59 years. Households in Mount Moriac are primarily couples with children and are likely to be repaying $3000 - $3999 per month on mortgage repayments. In general, people in Mount Moriac work in a managers occupation. In 2011, 84.7% of the homes in Mount Moriac were owner-occupied compared with 73.5% in 2016.