DemographicsUpper Manilla is approximately 187.49 square kilometres. In 2016 the population of Upper Manilla was 124. The population is 50% male and 50% female. On average the monthly mortgage repayments in Upper Manilla are $0 to $299. The most common weekly income bracket is $650 to $799 per week. Weekly rents in the area are on average $100 to $149.