Lord of Connaught (Irish: Tighearna Connacht) was a title used by several Norman barons in Ireland.
During the Norman invasion of Ireland, William de Burgh (d.1206) was apparently granted Connacht, but never took possession of it.
It remained in the hands of native kings until 1224, when his son, Richard Mor de Burgh, claimed it on the basis of his father's grant.
Richard called upon the feudal levies of Ireland and conquered Connacht (1235), assuming the title Lord of Connaught.
It was not recognized in the Peerage of Ireland, and the heirs-general of William Donn, who retained the title Earl of Ulster, did not continue to use it.