Cullen Bullen is a village in New South Wales, Australia. It is located on Mudgee Road, 168 km north-west of Sydney, 28 km north of Lithgow. At the 2016 census, Cullen Bullen had a population of 279 people, up from 198 ten years earlier. The Cullen Bullen village is sustained by local mines and the Mount Piper Power Station.