DemographicsWondabyne is approximately 24.79 square kilometres. In 2016 the population of Wondabyne was 4. The population is 100% male and 0% female. On average the monthly mortgage repayments in Wondabyne 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.