| 1 | Sat 12 Dec 2020 | 18 1-1 v Mansfield TownGrimsby Town 1-1 Mansfield Town | Sky Bet League Two |
| 2 | Tue 15 Dec 2020 | 181-3 v Southend UnitedSouthend United 3-1 Grimsby Town | Sky Bet League Two |
| 3 | Sat 19 Dec 2020 | 181-0 v Scunthorpe UnitedGrimsby Town 1-0 Scunthorpe United | Sky Bet League Two |
| 4 | Tue 22 Dec 2020 | 181-2 v Bradford CityGrimsby Town 1-2 Bradford City | Sky Bet League Two |
| 5 | Sat 26 Dec 2020 | 181-3 v MorecambeMorecambe 3-1 Grimsby Town | Sky Bet League Two |
| 6 | Tue 29 Dec 2020 | 180-0 v Oldham AthleticGrimsby Town 0-0 Oldham Athletic | Sky Bet League Two |
| 7 | Sat 2 Jan 2021 | 181-2 v Cambridge UnitedGrimsby Town 1-2 Cambridge United | Sky Bet League Two |
| 8 | Sat 9 Jan 2021 | 180-3 v Port ValePort Vale 3-0 Grimsby Town | Sky Bet League Two |
| 9 | Tue 23 Feb 2021 | 182-1 v Crawley TownGrimsby Town 2-1 Crawley Town | Sky Bet League Two |
| 10 | Sat 27 Feb 2021 | 180-1 v Harrogate TownHarrogate Town 1-0 Grimsby Town | Sky Bet League Two |
| 11 | Tue 2 Mar 2021 | 180-1 v Leyton OrientGrimsby Town 0-1 Leyton Orient | Sky Bet League Two |
| 12 | Sat 6 Mar 2021 | 181-2 v Forest Green RoversGrimsby Town 1-2 Forest Green Rovers | Sky Bet League Two |
| 13 | Tue 9 Mar 2021 | 181-1 v Carlisle UnitedCarlisle United 1-1 Grimsby Town | Sky Bet League Two |
| 14 | Sat 13 Mar 2021 | 180-0 v Colchester UnitedGrimsby Town 0-0 Colchester United | Sky Bet League Two |
| 15 | Wed 17 Mar 2021 | 180-0 v Tranmere RoversGrimsby Town 0-0 Tranmere Rovers | Sky Bet League Two |
| 16 | Sat 10 Apr 2021 | 180-1 v Bradford CityBradford City 1-0 Grimsby Town | Sky Bet League Two |
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