DemographicsAvalon is approximately 45.16 square kilometres. In 2016 the population of Avalon was 293. The population is 56% male and 44% female. On average the monthly mortgage repayments in Avalon are $1800 to $2399. The most common weekly income bracket is $150 to $299 per week. Weekly rents in the area are on average $100 to $149.