Sean O'Sullivan

• Seán Ó Súilleabháin (1903–1996), folklorist involved in the Irish Folklore Commission
• Sean O'Sullivan (baseball) (born 1987), Major League Baseball pitcher
• Sean O'Sullivan (engineer), entrepreneur and engineer
• Seán O'Sullivan (footballer) (fl. 2000s), Irish Gaelic footballer who plays for Kerry and Cromane
• Seán O'Sullivan (painter) (1906–1964), Irish painter
• Sean O'Sullivan (priest) (1952–1989), Canadian politician and priest
• Sean O'Sullivan (rugby league) (born 1998), Australian rugby league player
• Sean O'Sullivan (snooker player)
• Shawn O'Sullivan (born 1962), retired Canadian boxer

• Sean Sullivan (disambiguation)

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