Con O'Neill

Irish noblemen

• Conn O'Neill (d. 1482), lord of Clandeboye in medieval Ireland
• Conn O'Neill, 1st Earl of Tyrone, King of Tír Eóghain
• Conn O'Neill (died 1601), Irish soldier
• Conn O'Neill (prisoner), seventeenth century Irish aristocrat
• Conn Ó Néill, head of the Clandeboye O'Neill dynasty

Other

• Con O'Neill (actor), British actor
• Con O'Neill (diplomat), British diplomat