DemographicsMarong is approximately 76.13 square kilometres. In 2016 the population of Marong was 1416. The population is 49% male and 51% female. On average the monthly mortgage repayments in Marong are $1400 to $1799. The most common weekly income bracket is $800 to $999 per week. Weekly rents in the area are on average $275 to $349.