DemographicsDouglas River is approximately 16.33 square kilometres. In 2016 the population of Douglas River was 30. The population is 48% male and 52% female. On average the monthly mortgage repayments in Douglas River are $1000 to $1399. The most common weekly income bracket is $400 to $499 per week. Weekly rents in the area are on average $0 to $74.