DemographicsGlenbrae is approximately 27.2 square kilometres. In 2016 the population of Glenbrae was 30. The population is 52% male and 48% female. On average the monthly mortgage repayments in Glenbrae are $0 to $299. The most common weekly income bracket is $0 to $149 per week. Weekly rents in the area are on average $0 to $74.