DemographicsClarendon (Qld) is approximately 18.14 square kilometres. In 2016 the population of Clarendon (Qld) was 244. The population is 47% male and 53% female. On average the monthly mortgage repayments in Clarendon (Qld) are $1000 to $1399. The most common weekly income bracket is $300 to $399 per week. Weekly rents in the area are on average $0 to $74.