DemographicsMardi is approximately 9.5 square kilometres. In 2016 the population of Mardi was 3684. The population is 48% male and 52% female. On average the monthly mortgage repayments in Mardi are $1800 to $2399. The most common weekly income bracket is $800 to $999 per week. Weekly rents in the area are on average $350 to $449.