DemographicsStrathdownie is approximately 530.57 square kilometres. In 2016 the population of Strathdownie was 183. The population is 50% male and 50% female. On average the monthly mortgage repayments in Strathdownie are $800 to $999. The most common weekly income bracket is $500 to $649 per week. Weekly rents in the area are on average $0 to $74.