| 1. Journée | 12.09.2020 | Walsall FC | - | Grimsby Town | 1:0 | ||||
| 2. Journée | 19.09.2020 | Grimsby Town | - | Salford City | 0:4 |  |
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| 3. Journée | 13.10.2020 | Cheltenham Town | - | Grimsby Town | 1:3 |  |
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| 7. Journée | 20.10.2020 | Grimsby Town | - | Harrogate Town | 1:2 | |
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| 8. Journée | 24.10.2020 | Grimsby Town | - | Carlisle United | 1:1 | ||||
| 9. Journée | 27.10.2020 | Forest Green Rovers | - | Grimsby Town | 1:0 | ||||
| 10. Journée | 31.10.2020 | Stevenage FC | - | Grimsby Town | 0:0 | ||||
| 17. Journée | 12.12.2020 | Grimsby Town | - | Mansfield Town | 1:1 | ||||
| 18. Journée | 15.12.2020 | Southend United | - | Grimsby Town | 3:1 | ||||
| 19. Journée | 19.12.2020 | Grimsby Town | - | Scunthorpe United | 1:0 | ||||
| 4. Journée | 22.12.2020 | Grimsby Town | - | Bradford City | 1:2 | ||||
| 20. Journée | 26.12.2020 | Morecambe FC | - | Grimsby Town | 3:1 | ||||
| 21. Journée | 29.12.2020 | Grimsby Town | - | Oldham Athletic | 0:0 | ||||
| 22. Journée | 02.01.2021 | Grimsby Town | - | Cambridge United | 1:2 |
Angleterre