Sean O'Sullivan

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