The Desmond Rebellions occurred in 1569–1573 and 1579–1583 in the Irish province of Munster. They were rebellions by the Earl of Desmond, the head of the FitzGerald dynasty in Munster, and his followers, the Geraldines and their allies, against the threat of the extension of the English government over the province. The rebellions were motivated primarily by the desire to maintain the independence of feudal lords from their monarch but also had an element of religious antagonism between Catholic Geraldines and the Protestant English state. They culminated in the destruction of the Desmond dynasty and the plantation or colonisation of Munster with English Protestant settlers. 'Desmond' is the Anglicisation of the Irish Deasmumhain, meaning 'South Munster'.

Munster is one of the four provinces of Ireland, located in the south of the island. In early Ireland, the Kingdom of Munster was one of the kingdoms of Gaelic Ireland ruled by a "king of over-kings". Following the Norman invasion of Ireland, the ancient kingdoms were shired into counties for administrative and judicial purposes. In later centuries, local government legislation has seen further sub-division of the historic counties.