Charles O'Neill may refer to:

• Charles O'Neill (musician) (1882–1964), Canadian bandmaster, composer, organist, cornetist, and music educator
• Charles O'Neill (Pennsylvania politician) (1821–1893), U.S. Representative from Pennsylvania
• Charles O'Neill (engineer) (1828–1900), Australasian philanthropist and politician
• Charles H. O'Neill (1800–1897), U.S. politician
• Charles O'Neill, 1st Earl O'Neill (1779–1841), Irish politician, peer and landowner
• Charles O'Neill (Irish nationalist politician) (1849–1918), Member of Parliament for South Armagh, 1909–1918

• Charles O'Neal
• Charles O'Neil

Topics referred to by the same term

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