Henry O'Neill (disambiguation)

• Baron Dungannon
• Flirtation Walk
• Harry O'Neill (disambiguation)
• Henrique O'Neill, 1st Viscount of Santa Mónica
• Henry E. O'Neill
• Henry MacShane O'Neill
• Henry O'Neil (disambiguation)
• Henry O'Neill
• Henry O'Neill (illustrator)
• Henry O'Neill, 2nd Baron Dungannon
• Henry Oge O'Neill
• O'Neill baronets