O
| Surname | First name | From | Sentence | Other | Transport ship |
| O'CRAFT | John | Exeter | 7 | Charlotte | |
| OGDEN | James | Manchester | 7 | Alexander | |
| OKEY | William | Gloucester | 7 | Alexander | |
| OLDFIELD | Thomas | Manchester | 7 | Friendship | |
| OLDFIELD | Isabella | Manchester | 7 | Friendship | |
| OLIVER | Josh | 7 years | Alexander | ||
| ORFORD | Thomas | London | 7 | Alexander | |
| OSBORNE | Thomas | London | 7 | Alexander | |
| OSBORNE | Elizabeth | London | 7 | alias Jones | Lady Penrhyn |
| OWLES | John | Croydon | 7 | Alexander | |
| OWEN | John | London | 7 | Scarborough | |
| OWEN | Joseph | Shewsbury | 14 | Friendship |
Read more about this topic: List Of Convicts On The First Fleet