DemographicsBarramunga is approximately 88.36 square kilometres. In 2016 the population of Barramunga was 7. The population is 100% male and 0% female. On average the monthly mortgage repayments in Barramunga are $1000 to $1399. The most common weekly income bracket is $400 to $499 per week. Weekly rents in the area are on average $0 to $74.