DemographicsMount Moriac is approximately 40.65 square kilometres. In 2016 the population of Mount Moriac was 240. The population is 52% male and 48% female. On average the monthly mortgage repayments in Mount Moriac are $3000 to $3999. The most common weekly income bracket is $500 to $649 per week. Weekly rents in the area are on average $275 to $349.