| Michael Ochartner Austria | Jesse O'Datey US | Ohio Valley Section VOC US |
| Ed Olds US | Derek E. Olivant UK | Rick Ollild US |
| Alf Olofsson Sweden | John S. O'Loughlin US | Hoff Olson Denmark |
| Brad Oman US | Chris O'Neil US | I. A. Orford UK |
| Joseph J. Orlando US | Sid Ormrod UK | J. Barry Orr MBE UK |
| C. L. Osborn UK | Gerald Osborn UK | Perry Osgood US |
| Oldf Ostberg Sweden | Jan C. Otto US | Robert Owen Canada |