DemographicsLower Cressbrook is approximately 15.74 square kilometres. In 2016 the population of Lower Cressbrook was 16. The population is 25% male and 75% female. On average the monthly mortgage repayments in Lower Cressbrook are $0 to $299. The most common weekly income bracket is $800 to $999 per week. Weekly rents in the area are on average $0 to $74.