Brendan O'Brien
Brendan O'Brien is the name of the following people:
- Brendan O'Brien (cricketer) (born 1942), Irish cricketer
- Brendan O'Brien (journalist) , Irish journalist
- Brendan O'Brien (music producer) (* 1960), American music producer, sound engineer and musician
- Brendan O'Brien (voice actor) (born 1962), American voice actor
- Brendan O'Brien (screenwriter) , American screenwriter
- Brendan Michael O'Brien (born 1943), Canadian clergyman, Archbishop of Kingston