DemographicsSerpentine (Vic.) is approximately 168.09 square kilometres. In 2016 the population of Serpentine (Vic.) was 192. The population is 52% male and 48% female. On average the monthly mortgage repayments in Serpentine (Vic.) are $600 to $799. The most common weekly income bracket is $1000 to $1249 per week. Weekly rents in the area are on average $0 to $74.