Coonabarabran is a town in Warrumbungle Shire that sits on the divide between the Central West and North West Slopes regions of New So…Coonabarabran is a town in Warrumbungle Shire that sits on the divide between the Central West and North West Slopes regions of New South Wales, Australia. At the 2021 census, the town had a population of 2,387, and as of 2021, the population of Coonabarabran and its surrounding area is 3,477. Local and district residents refer to the town as 'Coona'. Coonabarabran is the gateway to the Warrumbungle National Park, Siding Spring Observatory and the Pilliga Forest.