Daniel, Danny or Dan O'Sullivan may refer to:
- Daniel O'Sullivan (musician) (born 1980), English musician
- Daniel O'Sullivan (priest) (1846–1928), Irish priest and theologian
- Danny O'Sullivan (Australian rules footballer) (born 1952)
- Danny O'Sullivan (boxer) (1923–1990), English boxer
- Dan O'Sullivan (basketball) (born 1968), American basketball player
- Dan O'Sullivan (Gaelic footballer) (1927–2013), Irish Gaelic footballer
- Dan O'Sullivan (historian), British author of Misplaced Pages – A New Community of Practice?
Topics referred to by the same termThis disambiguation page lists articles about people with the same name. If an internal link led you here, you may wish to change the link to point directly to the intended article. Category: