| Name | Sailor ID | Most Recent Declaration |
|---|---|---|
| Jack Murray | GBRJM215 | 85.0kg - Amateur |
| Ed Myers | GBREM60 | 85.0kg - Amateur |
| Alan Nakanishi | USAAN2 | 58.0kg - Amateur |
| Martin Neidhardt | AUTMN1 | 100.0kg - Amateur |
| Tony Norris | RSATN2 | 85.0kg - Amateur |
| Jacek Nowak | POLJN1 | 84.0kg - Professional |
| Sam O’Byrne | IRLSO38 | 70.0kg - Amateur |
| Darragh O'connor | IRLDO41 | 76.0kg - Amateur |
| Mike O'Donovan | GBRMO28 | 86.0kg - Amateur |
| Jon O'Dowd | IRLJO66 | 85.0kg - Amateur |
| Richard O'Farrell | GBRRO05 | 74.0kg - Professional |
| Tom Offer | GBRTO11 | 72.0kg - Amateur |
| Sally O'flynn | IRLSO44 | 52.0kg - Amateur |
| Dan O'Grady | IRLD099 | |
| Dan O'Grady | IRLDO99 | 92.0kg - Amateur |
| Ewan O'Keeffe | IRLEO32 | 85.0kg - Amateur |
| Will Oldroyd | GBRWO10 | 95.0kg - Professional |
| Anthony O'Leary | IRLAO2 | 85.0kg - Amateur |
| Nicholas O'Leary | IRLNO7 | 94.0kg - Professional |
| Peter O'Leary | IRLPO17 | |
| Robert O'Leary | IRLRO31 | 85.0kg - Amateur |
| Gabriele Olivo | ITAGO1 | |
| Sebastian Olsen | DENSO5 | 88.0kg - Professional |
| Jochem Oostenbroek | NEDJO5 | 85.0kg - Amateur |
| Sean O'Rourke | AUSSO9 | 72.0kg - Professional |