DemographicsIronbark (NSW) is approximately 142.95 square kilometres. In 2016 the population of Ironbark (NSW) was 31. The population is 50% male and 50% female. On average the monthly mortgage repayments in Ironbark (NSW) are $0 to $299. The most common weekly income bracket is $500 to $649 per week. Weekly rents in the area are on average $0 to $74.