Dungog is a country town on the Williams River in the Hunter region and a small part of the Mid North Coast region of New South Wales, Australia. Located in the middle of dairy and timber country, it is the centre of the Dungog Shire local government area and at the 2016 census it had a population of 2,025 people. The area includes the Fosterton Loop, 22 kilometres (14 mi) of road, used in the annual Pedalfest. A small portion of Dungog lies in the Mid-Coast Council LGA.

The Williams River is a perennial stream that is a tributary of the Hunter River, in the Hunter Region of New South Wales, Australia.