DemographicsSwan Bay (Tas.) is approximately 13.89 square kilometres. In 2016 the population of Swan Bay (Tas.) was 286. The population is 52% male and 48% female. On average the monthly mortgage repayments in Swan Bay (Tas.) are $1000 to $1399. The most common weekly income bracket is $1000 to $1249 per week. Weekly rents in the area are on average $350 to $449.