| 1 | Sat 12 Dec 2020 | 161-1 v Mansfield TownGrimsby Town 1-1 Mansfield Town | Sky Bet League Two |
| 2 | Tue 15 Dec 2020 | 161-3 v Southend UnitedSouthend United 3-1 Grimsby Town | Sky Bet League Two |
| 3 | Sat 19 Dec 2020 | 161-0 v Scunthorpe UnitedGrimsby Town 1-0 Scunthorpe United | Sky Bet League Two |
| 4 | Tue 22 Dec 2020 | 161-2 v Bradford CityGrimsby Town 1-2 Bradford City | Sky Bet League Two |
| 5 | Sat 26 Dec 2020 | 161-3 v MorecambeMorecambe 3-1 Grimsby Town | Sky Bet League Two |
| 6 | Tue 29 Dec 2020 | 160-0 v Oldham AthleticGrimsby Town 0-0 Oldham Athletic | Sky Bet League Two |
| 7 | Sat 2 Jan 2021 | 161-2 v Cambridge UnitedGrimsby Town 1-2 Cambridge United | Sky Bet League Two |
| 8 | Sat 16 Jan 2021 | 160-0 v Southend UnitedGrimsby Town 0-0 Southend United | Sky Bet League Two |
| 9 | Sat 23 Jan 2021 | 160-3 v Scunthorpe UnitedScunthorpe United 3-0 Grimsby Town | Sky Bet League Two |
| 10 | Sat 30 Jan 2021 | 161-2 v StevenageGrimsby Town 1-2 Stevenage | Sky Bet League Two |
| 11 | Sat 13 Mar 2021 | 160-0 v Colchester UnitedGrimsby Town 0-0 Colchester United | Sky Bet League Two |
| 12 | Wed 17 Mar 2021 | 160-0 v Tranmere RoversGrimsby Town 0-0 Tranmere Rovers | Sky Bet League Two |
| 13 | Sat 20 Mar 2021 | 16 2-2 v Mansfield TownMansfield Town 2-2 Grimsby Town | Sky Bet League Two |
| 14 | Sat 27 Mar 2021 | 161-1 v WalsallGrimsby Town 1-1 Walsall | Sky Bet League Two |
| 15 | Sat 17 Apr 2021 | 162-1 v Bolton WanderersGrimsby Town 2-1 Bolton Wanderers | Sky Bet League Two |
| 16 | Tue 20 Apr 2021 | 160-3 v MorecambeGrimsby Town 0-3 Morecambe | Sky Bet League Two |
| 17 | Sat 24 Apr 2021 | 162-1 v Oldham AthleticOldham Athletic 1-2 Grimsby Town | Sky Bet League Two |
| 18 | Tue 27 Apr 2021 | 162-3 v Exeter CityExeter City 3-2 Grimsby Town | Sky Bet League Two |
| 19 | Sat 1 May 2021 | 161-0 v Port ValeGrimsby Town 1-0 Port Vale | Sky Bet League Two |
| 20 | Sat 8 May 2021 | 160-3 v Cambridge UnitedCambridge United 3-0 Grimsby Town | Sky Bet League Two |
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