DemographicsLake Goldsmith is approximately 70.29 square kilometres. In 2016 the population of Lake Goldsmith was 29. The population is 42% male and 58% female. On average the monthly mortgage repayments in Lake Goldsmith are $1400 to $1799. The most common weekly income bracket is $0 to $149 per week. Weekly rents in the area are on average $0 to $74.