DemographicsMount Olive (Singleton - NSW) is approximately 38.1 square kilometres. In 2016 the population of Mount Olive (Singleton - NSW) was 146. The population is 48% male and 52% female. On average the monthly mortgage repayments in Mount Olive (Singleton - NSW) are $1800 to $2399. The most common weekly income bracket is $0 to $149 per week. Weekly rents in the area are on average $0 to $74.