Joseph O'Neill

• Joseph O'Neill (writer, born 1964), Irish-born novelist and author of Netherland
• Joseph O'Neill (writer, born 1886), Irish novelist
• Joseph O'Neill (politician), Irish politician, member of the 14th Seanad
• Joseph P. O'Neill, American Democratic Party strategist in Washington, D.C.
• Joe O'Neill, English footballer
• Joseph H. O'Neil, U.S. Representative
• Joseph P. O'Neil, U.S. Army general
• Joseph T. O'Neill, American lawyer and politician