DemographicsMorass Bay is approximately 1.59 square kilometres. In 2016 the population of Morass Bay was 4. The population is 100% male and 0% female. On average the monthly mortgage repayments in Morass Bay are $0 to $299. The most common weekly income bracket is $400 to $499 per week. Weekly rents in the area are on average $0 to $74.