DemographicsWollomombi is approximately 382.27 square kilometres. In 2016 the population of Wollomombi was 112. The population is 53% male and 47% female. On average the monthly mortgage repayments in Wollomombi are $800 to $999. The most common weekly income bracket is $1000 to $1249 per week. Weekly rents in the area are on average $0 to $74.