DemographicsMalbina is approximately 1.22 square kilometres. In 2016 the population of Malbina was 67. The population is 50% male and 50% female. On average the monthly mortgage repayments in Malbina are $1400 to $1799. The most common weekly income bracket is $800 to $999 per week. Weekly rents in the area are on average $350 to $449.