DemographicsWilsons Plains is approximately 10.85 square kilometres. In 2016 the population of Wilsons Plains was 50. The population is 59% male and 41% female. On average the monthly mortgage repayments in Wilsons Plains are $0 to $299. The most common weekly income bracket is $1000 to $1249 per week. Weekly rents in the area are on average $0 to $74.