Father James Coigly (1761 – 7 June 1798) was a Roman Catholic priest in Ireland active in the republican movement against the British Crown and the kingdom's Protestant Ascendancy. He served the Society of United Irishmen as a mediator in the sectarian Armagh Disturbances and an envoy both to the government of the French Republic and to radical circles in England with whom he sought to coordinate an insurrection. In June 1798 he was executed in England for treason having been detained as he was about to embark on a return mission to Paris.