| 2. Round | 12/08/2023 | Notts County | - | Grimsby Town | 3:2 | ||||
| 3. Round | 15/08/2023 | Grimsby Town | - | Salford City | 2:0 | ||||
| 4. Round | 19/08/2023 | Grimsby Town | - | Mansfield Town | 1:1 | ||||
| 8. Round | 16/09/2023 | Wrexham AFC | - | Grimsby Town | 3:0 | ||||
| 10. Round | 30/09/2023 | Swindon Town | - | Grimsby Town | 2:1 | ||||
| 11. Round | 03/10/2023 | Grimsby Town | - | Barrow AFC | 2:1 | ||||
| 12. Round | 07/10/2023 | Tranmere Rovers | - | Grimsby Town | 2:2 | ||||
| 13. Round | 14/10/2023 | Grimsby Town | - | Accrington Stanley | 0:2 |  |
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| 19. Round | 25/11/2023 | Grimsby Town | - | Sutton United | 1:1 | ||||
| 25. Round | 29/12/2023 | Salford City | - | Grimsby Town | 0:3 | ||||
| 26. Round | 01/01/2024 | Grimsby Town | - | Walsall FC | 1:6 |
England