DemographicsGringegalgona is approximately 96.05 square kilometres. In 2016 the population of Gringegalgona was 21. The population is 57% male and 43% female. On average the monthly mortgage repayments in Gringegalgona are $0 to $299. The most common weekly income bracket is $300 to $399 per week. Weekly rents in the area are on average $0 to $74.