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See also: Special:Categories/Sean O'Sullivan, Special:PrefixIndex/Category:Sean O'Sullivan and all pages with titles containing “Category:Sean O'Sullivan”
Sean O'Sullivan may refer to:
- Sean O'Sullivan (1964-), engineer, entrepreneur and philanthrophist from the United States
- Sean O'Sullivan (1987-), baseball player from the United States
- Sean O'Sullivan (1994-), snooker player from the United Kingdom