DemographicsBlythdale is approximately 139.05 square kilometres. In 2016 the population of Blythdale was 39. The population is 51% male and 49% female. On average the monthly mortgage repayments in Blythdale 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.