Coonabarabran High School (abbreviated as CHS) is a public co-educational secondary day school, located on the Newell Highway in southern Coonabarabran, a town located in the Central West and North West Slopes regions of New South Wales, Australia.

Following an appeal by the Parents & Citizens' Association of Coonabarabran Public School to the Minister for Education, Clive Evatt, in late 1941, the NSW Department of Education made the decision to upgrade the existing Coonabarabran Public School (established in 1870) to the status of "Intermediate High School", with the existing school now providing primary and secondary education.

[6] On 18 March 1942, Minister Evatt formally opened the school, laying a memorial stone to mark the occasion.

[9] On 16 October 1974, the school was visited by Charles, The Prince of Wales.

[10][11][12] In the 2006 Queen's Birthday Honours, the school principal from 1999 to 2006, Michael Robert McEntyre, was awarded the Medal of the Order of Australia (OAM) for "service to secondary education in rural New South Wales and to school sport through Rugby League coaching and administrative roles.