Jim O'Brien
Jim O'Brien may refer to:
Sports
Basketball
- Jim O'Brien (basketball, born 1950), American coach for Emerson College, Ohio State and Boston College
- Jim O'Brien (basketball, born 1951), American player for the New York Nets and Memphis Sounds
- Jim O'Brien (basketball, born 1952), American coach for the Boston Celtics, Philadelphia 76ers, and Indiana Pacers
Football and rugby
- Jim O'Brien (American football), professional football player
- Jim O'Brien (Australian footballer), Australian rules footballer for St Kilda
- Jimmy O'Brien (footballer), Australian rules footballer for Essendon
- Jim O'Brien (footballer, born 1987), Scottish footballer
- Jim O'Brien (rugby, born 1897), New Zealand dual-code rugby international
- Jim O'Brien (rugby league, born 1896), New Zealand rugby league player
- Jamie O'Brien (footballer), Irish association footballer
Hurling
- Jim O'Brien (Limerick hurler), Irish hurler for Limerick
- Jim O'Brien (Tipperary hurler), Irish hurler
- Jimmy O'Brien, Irish hurler for Wexford
Other sports
- Jim O'Brien (ice hockey), American ice hockey center
Other
- Jim O'Brien (director), Scottish-born stage and television director
- Jim O'Brien (reporter), reporter and television personality
- Jim O'Brien, founder and CEO of oil spill cleanup company The O'Brien's Group