Con O'Neill
Con O'Neill or Conn O'Neill may refer to:
Irish noblemen
- Conn O'Neill (d. 1482), lord of Clandeboye in medieval Ireland
- Conn O'Neill, 1st Earl of Tyrone (c. 1480–1559), King of {{lang|ga|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) (born 1966), British actor
- Con O'Neill (diplomat) (1912–1988), British diplomat
{{hndis|Oneill, Con}}