David O'Sullivan

David O'Sullivan may refer to:


 * Dave O'Sullivan (horse trainer) (1933–2024), New Zealand horse trainer
 * David O'Sullivan (cricketer, born 1944), New Zealand cricketer
 * David O'Sullivan (civil servant) (born 1953), Irish civil servant for the European Union
 * David O'Sullivan (hurler) (born 1988), Irish hurler
 * David O'Sullivan (cricketer, born 1997), Australian-born Welsh cricketer
 * David O'Sullivan (bowler), American ten-pin bowler
 * David O'Sullivan, character in Black and White