DemographicsAllandale (Qld) is approximately 48.77 square kilometres. In 2016 the population of Allandale (Qld) was 56. The population is 60% male and 40% female. On average the monthly mortgage repayments in Allandale (Qld) are $0 to $299. The most common weekly income bracket is $500 to $649 per week. Weekly rents in the area are on average $0 to $74.