DemographicsBannockburn (Vic.) is approximately 82.73 square kilometres. In 2016 the population of Bannockburn (Vic.) was 5283. The population is 50% male and 50% female. On average the monthly mortgage repayments in Bannockburn (Vic.) are $1800 to $2399. The most common weekly income bracket is $1000 to $1249 per week. Weekly rents in the area are on average $275 to $349.