DemographicsKaroola is approximately 32.18 square kilometres. In 2016 the population of Karoola was 318. The population is 52% male and 48% female. On average the monthly mortgage repayments in Karoola 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.