John B. O'Brien
- Title : John B. O'Brien
- Popularity : 1.204
- Known For : Directing
- Birthday : 1884-12-13
- Place of Birth : Roanoke, Virginia, USA
- Homepage :
- Also Known As : J.B. O'Brien, Jack G. O'Brien, Jack O'Brien, John D. O'Brien, John O'Brien, Ryan Sherwood