Nyngan [pr: ning-g'n] is a town in the centre of New South Wales, Australia in the Bogan Shire local government area within the Orana Region of central New South Wales. At the 2011 census, Nyngan had a population of 2,073 people. Nyngan is situated on the Bogan River between Narromine and Bourke, on the junction of the Mitchell Highway and Barrier Highway, 583 km north-west of Sydney. The Barrier Highway starts at Nyngan, and runs west to Cobar and on through Wilcannia and Broken Hill into South Australia.
Nyngan Airport is a small airport just north of the city center. Nyngan also lies on the Main Western railway line of New South Wales but is no longer served by passenger trains. The line remains open to freight traffic.
About 70 kilometres south of the town a cairn has been erected to mark the geographical centre of New South Wales.