| 30. Round | 27/01/2024 | Grimsby Town | - | Tranmere Rovers | 1:2 |  |
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| 34. Round | 17/02/2024 | Grimsby Town | - | Doncaster Rovers | 1:5 | ||||
| 35. Round | 24/02/2024 | Morecambe FC | - | Grimsby Town | 1:1 | ||||
| 36. Round | 02/03/2024 | Grimsby Town | - | Forest Green Rovers | 1:0 | ||||
| 27. Round | 05/03/2024 | AFC Wimbledon | - | Grimsby Town | 0:0 | ||||
| 37. Round | 09/03/2024 | Sutton United | - | Grimsby Town | 1:1 | ||||
| 38. Round | 12/03/2024 | Grimsby Town | - | Milton Keynes Dons | 1:0 | ||||
| 39. Round | 16/03/2024 | Gillingham FC | - | Grimsby Town | 1:1 |  |
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| 40. Round | 23/03/2024 | Grimsby Town | - | Wrexham AFC | 1:3 | ||||
| 41. Round | 29/03/2024 | Barrow AFC | - | Grimsby Town | 3:1 | ||||
| 42. Round | 01/04/2024 | Grimsby Town | - | Bradford City | 1:1 | ||||
| 43. Round | 06/04/2024 | Grimsby Town | - | Newport County | 1:0 | ||||
| 29. Round | 09/04/2024 | Harrogate Town | - | Grimsby Town | 1:0 | ||||
| 44. Round | 13/04/2024 | Crewe Alexandra | - | Grimsby Town | 0:3 | ||||
| 33. Round | 16/04/2024 | Colchester United | - | Grimsby Town | 2:0 |
England