DemographicsGreenmount (Toowoomba - Qld) is approximately 51.13 square kilometres. In 2016 the population of Greenmount (Toowoomba - Qld) was 699. The population is 49% male and 51% female. On average the monthly mortgage repayments in Greenmount (Toowoomba - Qld) are $1000 to $1399. The most common weekly income bracket is $650 to $799 per week. Weekly rents in the area are on average $225 to $275.