| Ollie Edward Robinson | England | right-hand-bat | right-arm-fast-medium | 100-Ball, 4day, List A, ODI, T10, T20, Test, Test/5day |
| Ollie George Robinson | England | right-hand-bat | - | 100-Ball, 4day, List A, T20 |
| Ollie Hairs | Scotland | left-hand-bat | right-arm-offbreak | T20I |
| Ollie Jones | Scotland | right-hand-bat | right-arm-fast | Youth ODI |
| Ollie Newton | New Zealand | left-hand-bat | right-arm-fast-medium | 4day, List A, ODI, T20 |
| Ollie Nightingale | Guernsey | right-hand-bat | - | T10, T20I |
| Ollie Patterson | Australia | - | - | List A, T20, Youth ODI |
| Ollie Pope | England | right-hand-bat | - | 100-Ball, 4day, List A, ODI, T20, Test, Test/5day |
| Ollie Rayner | England | right-hand-bat | right-arm-offbreak | 4day |
| Ollie Sale | England | right-hand-bat | right-arm-fast-medium | List A |
| Ollie Sutton | England | left-hand-bat | left-arm-fast-medium | 4day, List A |
| Ollie Sykes | England | left-hand-bat | right-arm-fast-medium | 4day, List A, T20 |
| Ollie White | New Zealand | left-hand-bat | slow-left-arm-orthodox | , T20, Youth ODI |
| Olly Birts | England | right-hand-bat | - | T10 |
| Olly Cox | England | - | - | - |
| Olly Pillinger | Scotland | - | - | Youth ODI |
| Olly Pringle | New Zealand | left-hand-bat | right-arm-fast-medium | 4day, List A, ODI, T20 |
| Olly Stone | England | right-hand-bat | right-arm-fast | 100-Ball, 4day, ODI, T10, T20, T20I, Test/5day |
| Olly Westbury | England | right-hand-bat | - | - |
| Oluhle Siyo | South Africa | - | - | T20I |
| Om Bhavsar | Germany | - | - | - |
| Om Mahyavanshi | Spain | - | - | - |
| Om Raj | India | right-hand-bat | right-arm-fast-medium | T10 |
| Om Sharma | India | right-hand-bat | right-arm-fast-medium | T10 |
| Om Singh | India | left-hand-bat | legbreak-googly | T20 |
| Om T Munde | India | right-hand-bat | legbreak-googly | T20 |
| Omaima Sohail | Pakistan | right-hand-bat | right-arm-offbreak | ODI, T20I |
| Omair Chaudhry | Germany | right-hand-bat | right-arm-fast-medium | T10 |
| Omair Diwan Ali | Belgium | right-hand-bat | right-arm-fast-medium | T10 |
| Omair Sultan | Netherlands | - | - | - |
| Omair Yousuf | Pakistan | right-hand-bat | - | T20, T20I |
| Omais Rehman | Spain | - | - | T10 |
| Omar Ali | Spain | right-hand-bat | right-arm-fast-medium | T10 |
| Omar Faruk | Bulgaria | - | - | T10 |
| Omar Faruk | Bangladesh | right-hand-bat | right-arm-fast-medium | T10 |
| Omar Hayat | Denmark | right-hand-bat | right-arm-offbreak | T10, T20I |
| Omar Masum | Estonia | - | - | T10 |
| Omar Rasool | Republic of Ireland | right-hand-bat | - | T10, T20I |
| Omar Sardar | Germany | - | - | - |
| Omar Willis | Cayman Islands | right-hand-bat | legbreak | T20I |
| Omar Zadran | Afghanistan | right-hand-bat | right-arm-fast-medium | - |
| Omary Koba | Tanzania | left-hand-bat | left-arm-fast-medium | - |
| Omarzai Ajmal | Norway | - | - | - |
| Omedullah Safi | Germany | right-hand-bat | right-arm-fast-medium | - |
| Omer Farooq | United Arab Emirates | - | - | T10, T20 |
| Omer Malik | Pakistan | right-hand-bat | right-arm-fast-medium | T10 |
| Omer Mustafa | France | right-hand-bat | right-arm-fast-medium | T10 |
| Omer Zahid | Hungary | right-hand-bat | right-arm-fast-medium | T10 |
| Omerkhel Islamuddin | Afghanistan | right-hand-bat | right-arm-fast-medium | T10 |
| Omid Bazgar | Sweden | right-hand-bat | right-arm-fast-medium | - |