Coopernook is a small town in mid-north New South Wales, Australia (post code 2426). It is located 24 kilometres north of Taree and 11 kilometres west of Harrington and is administered by Mid-Coast Council. At the 2021 census, Coopernook and the surrounding area had a population of 625 people, while the town itself had 430 inhabitants. It was formerly situated on the Pacific Highway, until 22 March 2006, when the Coopernook Bypass was opened. The old highway crossed the Lansdowne River on a narrow iron girder bridge.