| 31. Round | 03/02/2024 | Accrington Stanley | - | Grimsby Town | 0:0 |  |
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| 32. Round | 10/02/2024 | Grimsby Town | - | Stockport County | 1:3 | ||||
| 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 | |
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| 37. Round | 09/03/2024 | Sutton United | - | Grimsby Town | 1:1 | ||||
| 38. Round | 12/03/2024 | Grimsby Town | - | Milton Keynes Dons | 1:0 | |
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| 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 | |
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| 41. Round | 29/03/2024 | Barrow AFC | - | Grimsby Town | 3:1 | ||||
| 42. Round | 01/04/2024 | Grimsby Town | - | Bradford City | 1:1 | |
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| 29. Round | 09/04/2024 | Harrogate Town | - | Grimsby Town | 1:0 | |
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| 44. Round | 13/04/2024 | Crewe Alexandra | - | Grimsby Town | 0:3 |  |
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| 45. Round | 20/04/2024 | Grimsby Town | - | Swindon Town | 2:0 | ||||
| 46. Round | 27/04/2024 | Crawley Town | - | Grimsby Town | 2:0 |
England