David O'Brien
Dave, Davey or David O'Brien may refer to:
Sportsmen
- Davey O'Brien, American football quarterback
- Dave O'Brien (athletic director), American collegiate professor at Long Beach, Temple and Northeastern
- David O'Brien (racehorse trainer), Irish racehorse trainer during 1970s and 1980s
- Dave O'Brien (sportscaster), American sportscaster
- David O'Brien (sailor), Irish yacht racer in 2000 Summer Olympics
- David O'Brien (swimmer), English freestyle in 2004 Summer Olympics
- David O'Brien (footballer), Scottish left-sided midfielder
- Dave O'Brien (American football), American football player
Others
- Dave O'Brien (actor), American film and TV performer, director and writer
- David Wright O'Brien, American fantasy and science fiction writer
- David O'Brien (actor), American performer in daytime dramas
- David P. O'Brien, Canadian business executive since 1980s
- David O'Brien (politician), Australian politician from Victoria