DemographicsDartbrook is approximately 57.14 square kilometres. In 2016 the population of Dartbrook was 113. The population is 57% male and 43% female. On average the monthly mortgage repayments in Dartbrook are $1400 to $1799. The most common weekly income bracket is $650 to $799 per week. Weekly rents in the area are on average $0 to $74.