DemographicsGarden Island Creek is approximately 37.95 square kilometres. In 2016 the population of Garden Island Creek was 247. The population is 49% male and 51% female. On average the monthly mortgage repayments in Garden Island Creek are $1000 to $1399. The most common weekly income bracket is $500 to $649 per week. Weekly rents in the area are on average $0 to $74.