Frank O'Neill
Frank O'Neill may refer to:
- Frank "Buck" O'Neill, American football coach
- Frank O'Neill (politician), Australian politician and member of the New South Wales Legislative Assembly
- Frank O'Neill (swimmer), Australian swimmer
- Frank O'Neill (footballer, born 1940), Irish footballer
- Frank O'Neill (footballer, born 1953), Irish footballer
- Frank O'Neill (film director), director of The Overland Limited
- Frank O'Neill (jockey), American Hall of Fame jockey
- Frank S. O'Neil, American lawyer and athletic commissioner