| Name | Sailor ID | Most Recent Declaration |
|---|---|---|
| Jordan Janov | USAJJ162 | 75.0kg - Amateur |
| Dominik Janowczyk | POLDJ | |
| Lebo January | RSATJ3 | 64.0kg - Amateur |
| Paddy Jefferies | GBRPJ31 | |
| Stefan Jentzsch | GERSJ9 | 79.0kg - Amateur |
| Kent Joergensen | DENKJ12 | 71.0kg - Amateur |
| Dan Johnson | GBRDJ | 84.0kg - Amateur |
| Louis Johnson | GBRLJ14 | 82.0kg - Amateur |
| Louis Johnson | GBRLJ17 | |
| Will Johnson | GBRWJ11 | 82.0kg - Amateur |
| Martin Jones | GBRMJ45 | 86.0kg - Amateur |
| Verena Jongepier | NEDVJ1 | 66.0kg - Amateur |
| Kate Jordan | NZLKJ5 | 75.0kg - Amateur |
| Nick Joyce | GBRNJ17 | 90.0kg - Amateur |
| George Jubb | GBRGJ20 | 96.0kg - Amateur |
| Bidegaray Jules | FRABJ20 | 85.0kg - Professional |
| Karoly Kaltenecker | HUNKK24 | 93.0kg - Amateur |
| Colin Kavanagh | IRLCK3 | 91.0kg - Amateur |
| Tamas Kelemen | HUNTK6 | 80.0kg - Professional |
| David Kelly | IRLDK28 | 102.0kg - Amateur |
| Greg Kelly | GBRGK23 | |
| Angus Kemp | GBRAK57 | 82.0kg - Amateur |
| George Kennedy | GBRGK22 | 97.0kg - Professional |
| Harry Kennedy | GBRHK17 | 82.0kg - Amateur |
| Henry Kernot | AUSHK1 | 95.0kg - Amateur |