Hugh O'Neill

Hugh O'Neill or O'Neil may refer to:


 * Hugh O'Neill (d. 1524), king of Clandeboye in medieval Ireland
 * Hugh O'Neill, Earl of Tyrone (c. 1550–1616), Irish chieftain who resisted the annexation of Ireland by Elizabeth I of England
 * Hugh O'Neill, 1st Baron Rathcavan (1883–1982), Ulster Unionist politician who served as Father of the House of Commons
 * Hugh O'Neill, 3rd Baron Rathcavan (born 1939)
 * Hugh Dubh O'Neill (1611–1660), Irish soldier who commanded the defenders in the Siege of Clonmel and Siege of Limerick
 * Hugh O'Neil (1936–2015), Canadian politician
 * Hugh O'Neil (baseball), 19th-century baseball player
 * Hugh O'Neill (artist) (1784–1824), English artist
 * Hugh O'Neill (soccer) (born 1954), American soccer player
 * Hugh O'Neill (bishop) (1898–1955), coadjutor bishop of Dunedin, New Zealand, 1943–1946
 * Hugh O'Neill (Canadian football) (born 1990), Canadian football punter and placekicker
 * Hugh O'Neill, 3rd Baron Rathcavan (born 1939)
 * Hugh Boy O'Neill, the last ruler of the Cenél nEógain to be styled as king of Ailech
 * Hugh Oge O'Neill (died 1586)
 * Hugh McShane O'Neill, Irish nobleman and rebel
 * Hugh Gavelagh O'Neill (died 1590), Irish nobleman