DemographicsGlenrock (NSW) is approximately 304.52 square kilometres. In 2016 the population of Glenrock (NSW) was 31. The population is 55% male and 45% female. On average the monthly mortgage repayments in Glenrock (NSW) are $0 to $299. The most common weekly income bracket is $800 to $999 per week. Weekly rents in the area are on average $0 to $74.