Dubbo /ˈdʌboʊ/ is a city in the Orana Region of New South Wales, Australia. It is the largest population centre in the Orana region, with a population of 42,108, and serves an estimated catchment of 130,000.ubbo railway station lies on the Main Western railway line between Sydney and Bourke and opened in 1881. Dubbo station is the terminus for a daily NSW TrainLink XPT service from Sydney.