Earl of Desmond is a title in the peerage of Ireland which has been created four times since 1329. The title was first awarded to Maurice FitzGerald, 4th Baron Desmond, a Hiberno-Norman lord in Southwest Ireland, and it was held by his descendants until 1583 when they rose against the English crown in the Desmond Rebellions. Following two short-lived recreations of the title in the early 1600s, the title has been held since 1628 by the Feilding family of Warwickshire, England. The current holder is Alexander Feilding, 12th Earl of Denbigh and 11th Earl of Desmond.

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'.