Gary O'Neill

Gary, or Garry, O'Neill, or O'Neil, may refer to:


 * Gary O'Neil (born 1983), English footballer and manager
 * Gary O'Neil (Neighbours), a fictional character on Australian soap Neighbours
 * Garry O'Neill (born 1974), Australian martial artist
 * Gary O'Neill (born 1982), Irish footballer who played for Shelbourne in the 2000s
 * Gary O'Neill (born 1995), Irish footballer who, as of 2022, plays for Shamrock Rovers