DemographicsSunnyside (Qld) is approximately 44.6 square kilometres. In 2016 the population of Sunnyside (Qld) was 145. The population is 58% male and 42% female. On average the monthly mortgage repayments in Sunnyside (Qld) are $1800 to $2399. The most common weekly income bracket is $800 to $999 per week. Weekly rents in the area are on average $200 to $224.