DemographicsUpper Blessington is approximately 172.5 square kilometres. In 2016 the population of Upper Blessington was 61. The population is 46% male and 54% female. On average the monthly mortgage repayments in Upper Blessington are $1000 to $1399. The most common weekly income bracket is $500 to $649 per week. Weekly rents in the area are on average $0 to $74.