DemographicsPowlett Plains is approximately 118.4 square kilometres. In 2016 the population of Powlett Plains was 42. The population is 54% male and 46% female. On average the monthly mortgage repayments in Powlett Plains are $0 to $299. The most common weekly income bracket is $150 to $299 per week. Weekly rents in the area are on average $150 to $199.