Liam O'Brien
Liam O'Brien is the name of the following people:
- Liam O'Brien (screenwriter) (1913–1996), American screenwriter
- Liam O'Brien (athlete) (born 1954), Irish athlete
- Liam O'Brien (soccer player, 1964) (born 1964), Irish soccer player
- Liam O'Brien (voice actor) (born 1976), American voice actor
- Liam O'Brien (soccer player, 1991) (born 1991), English soccer player
- Liam O'Brien (ice hockey player) (born 1994), Canadian ice hockey player
