Hugh O'Neill
Hugh O'Neill or O'Neil may refer to:
Irish nobles
- Hugh Boy O'Neill, the last ruler of the Cenél nEógain to be styled as king of Ailech
- Hugh O'Neill (d. 1524), king of Clandeboye in medieval Ireland
- Hugh O'Neill, Earl of Tyrone, Irish chieftain who resisted the annexation of Ireland by Elizabeth I of England
- Hugh Oge O'Neill
- Hugh Gavelagh O'Neill, Irish nobleman
- Hugh McShane O'Neill, Irish nobleman and rebel
- Hugh O'Neill, 4th Baron Dungannon, Irish nobleman
- Hugh Dubh O'Neill, Irish soldier who commanded the defenders in the Siege of Clonmel and Siege of Limerick
- Hugh O'Neill, 1st Baron Rathcavan, Ulster Unionist politician who served as Father of the House of Commons
- Hugh O'Neill, 3rd Baron Rathcavan
Other
- Hugh O'Neil, Canadian politician
- Hugh O'Neil (baseball), 19th-century baseball player
- Hugh O'Neill (artist), English artist
- Hugh O'Neill (soccer), American soccer player
- Hugh O'Neill (bishop), coadjutor bishop of Dunedin, New Zealand, 1943–1946
- Hugh O'Neill (Canadian football), Canadian football punter and placekicker
- Hugh O’Neill - victor of Gaelic A Dublin championship 2024