Coopernook is a village 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 2011 census, Coopernook and the surrounding area had a population of 519 people. 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.
The Coopernook Primary School in Macquarie Street was established in 1875, and in 2006 it had an enrolment of 81. Its enrolment in 2007 was a similar number.
Coopernook Post Office opened on 1 November 1876.
Early settlers included Calvin, Rose, Eggins, Gillogilly, Longworth, Latham and Buchanan. A sandstone obelisk erected in 1997 commemorates the combatants in World War I, World War II and the Vietnam War.