Gearóid Ó Cuinneagáin (born John Gerald Cunningham; 2 January 1910–13 June 1991) was an Irish language activist, nationalist and far-right politician born in Belfast, Ireland.
He was the founder and leader of Ailtirí na hAiséirghe, a fascist party which sought to create a Christian corporatist state and revive the Irish language through the establishment of a totalitarian dictatorship in Ireland.