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 (–1616), Irish chieftain who resisted the annexation of Ireland by Elizabeth I of England Hugh Oge O'Neill (died 1586) Hugh Gavelagh O'Neill (died 1590), Irish nobleman Hugh McShane O'Neill, Irish nobleman and rebel Hugh O'Neill, 4th Baron Dungannon (–1609), Irish nobleman Hugh Dubh O'Neill (1611–1660), Irish soldier who commanded the defenders in the Siege of Clonmel and Siege of Limerick 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)
Other 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 (GAA Dublin minor star) - victor of Gaelic A Dublin championship 2024 See also Hugh O'Neills, Gaelic football team in Leeds, England O'Neill Building, originally Hugh O'Neill's Dry Goods Store, an 1887 landmarked in the Flatiron District of New York City