DemographicsBlackbutt South is approximately 16.5 square kilometres. In 2016 the population of Blackbutt South was 169. The population is 54% male and 46% female. On average the monthly mortgage repayments in Blackbutt South are $1400 to $1799. The most common weekly income bracket is $300 to $399 per week. Weekly rents in the area are on average $0 to $74.