DemographicsHillgrove (Wagga Wagga - NSW) is approximately 5.44 square kilometres. In 2016 the population of Hillgrove (Wagga Wagga - NSW) was 27. The population is 68% male and 32% female. On average the monthly mortgage repayments in Hillgrove (Wagga Wagga - NSW) are $0 to $299. The most common weekly income bracket is $150 to $299 per week. Weekly rents in the area are on average $150 to $199.