Eamon Donnelly (19 July 1877 – 29 December 1944) was an Irish politician. He was born in Middletown, County Armagh, the son of Francis Donnelly, a mason, and Catherine Donnelly (née Haggin). He was a member of the Irish Volunteers. In 1921 he joined Éamon de Valera's anti-treaty forces and remained a critic of partition until his death. He was interned and on his release was appointed Chief Organiser of Sinn Féin. In 1942, Donnelly was again elected to the Parliament of Northern Ireland, this time in a by-election for Belfast Falls. He did not take his seat. He died on 29 December 1944.