Clontibret (Irish: Cluain Tiobrad, meaning "Well of the meadow") is a village and a parish in County Monaghan, Ireland.

The village is situated close to the border with Northern Ireland, between the towns of Monaghan and Castleblayney, along the N2 National primary road, which links Dublin and Derry. The village population in 2006 was approximately 300.

Clontibret is a parish in the Diocese of Clogher. The Catholic parish has three churches - St. Mary's, north of Clontibret village, St. Michael's, in the nearby village of Annyalla and All Saints, in the village of Doohamlet, which is between the towns of Castleblayney and Ballybay. The Anglican Church of Ireland church is located on the ancient Christian site in Clontibret village. The wider parish area has a population of approximately 3,000 persons.

The Gaelic Athletic Association club in Clontibret is called Clontibret O'Neills (in honour of Hugh O'Neill Earl of Tyrone, victor at the Battle of Clontibret 1595).

In 1595 the adjacent countryside was the site of the Battle of Clontibret. The territory of Monaghan had been wrested from the control of the MacMahon clan in 1591, when the clan leader was executed by English authority. Subsequent encroachments by the English in to the province of Ulster led to the Nine Years War (1595–1603). The battle was the earliest clash between the two sides, with the Irish led by Hugh O'Neill and the English by Sir Henry Bagenal. Although O'Neill won the battle, the war ended with the completion of the English conquest of Ireland. In 1610 the Plantation of Ulster was established, an event that still defines certain political allegiances in the north of Ireland.