DemographicsLake Fyans is approximately 38.74 square kilometres. In 2016 the population of Lake Fyans was 27. The population is 52% male and 48% female. On average the monthly mortgage repayments in Lake Fyans are $1800 to $2399. The most common weekly income bracket is $0 to $149 per week. Weekly rents in the area are on average $0 to $74.