| 1 | Sat 11 Aug 2012 | 31-1 v SouthportSouthport 1-1 Grimsby Town | Blue Square Bet Premier |
| 2 | Tue 14 Aug 2012 | 31-2 v Stockport CountyGrimsby Town 1-2 Stockport County | Blue Square Bet Premier |
| 3 | Sat 18 Aug 2012 | 30-0 v Nuneaton TownGrimsby Town 0-0 Nuneaton Town | Blue Square Bet Premier |
| 4 | Sat 25 Aug 2012 | 30-0 v WrexhamWrexham 0-0 Grimsby Town | Blue Square Bet Premier |
| 5 | Mon 27 Aug 2012 | 34-1 v Mansfield TownGrimsby Town 4-1 Mansfield Town | Blue Square Bet Premier |
| 6 | Sat 1 Sep 2012 | 32-0 v Hereford UnitedHereford United 0-2 Grimsby Town | Blue Square Bet Premier |
| 7 | Tue 4 Sep 2012 | 32-2 v BarrowBarrow 2-2 Grimsby Town | Blue Square Bet Premier |
| 8 | Sat 8 Sep 2012 | 31-0 v Forest Green RoversGrimsby Town 1-0 Forest Green Rovers | Blue Square Bet Premier |
| 9 | Sat 15 Sep 2012 | 30-0 v Kidderminster HarriersKidderminster Harriers 0-0 Grimsby Town | Blue Square Bet Premier |
| 10 | Fri 21 Sep 2012 | 34-1 v Luton TownGrimsby Town 4-1 Luton Town | Blue Square Bet Premier |
| 11 | Tue 25 Sep 2012 | 33-0 v GatesheadGrimsby Town 3-0 Gateshead | Blue Square Bet Premier |
| 12 | Sat 29 Sep 2012 | 30-0 v Newport CountyNewport County 0-0 Grimsby Town | Blue Square Bet Premier |
| 13 | Sat 6 Oct 2012 | 30-2 v DartfordGrimsby Town 0-2 Dartford | Blue Square Bet Premier |
| 14 | Sat 27 Oct 2012 | 30-1 v Macclesfield TownGrimsby Town 0-1 Macclesfield Town | Blue Square Bet Premier |
| 15 | Sat 3 Nov 2012 | 31-0 v TamworthTamworth 0-1 Grimsby Town | Blue Square Bet Premier |
| 16 | Tue 6 Nov 2012 | 32-3 v HydeHyde 3-2 Grimsby Town | Blue Square Bet Premier |
| 17 | Sat 10 Nov 2012 | 35-1 v WokingGrimsby Town 5-1 Woking | Blue Square Bet Premier |
| 18 | Sat 17 Nov 2012 | 33-0 v Braintree TownGrimsby Town 3-0 Braintree Town | Blue Square Bet Premier |
| 19 | Sat 1 Dec 2012 | 31-1 v Ebbsfleet UnitedEbbsfleet United 1-1 Grimsby Town | Blue Square Bet Premier |
| 20 | Sat 8 Dec 2012 | 32-0 v TamworthGrimsby Town 2-0 Tamworth | Blue Square Bet Premier |
| 21 | Fri 21 Dec 2012 | 31-0 v WrexhamGrimsby Town 1-0 Wrexham | Blue Square Bet Premier |
| 22 | Wed 26 Dec 2012 | 34-1 v Lincoln CityLincoln City 1-4 Grimsby Town | Blue Square Bet Premier |
| 23 | Tue 1 Jan 2013 | 31-1 v Lincoln CityGrimsby Town 1-1 Lincoln City | Blue Square Bet Premier |
| 24 | Sat 26 Jan 2013 | 30-0 v Cambridge UnitedCambridge United 0-0 Grimsby Town | Blue Square Bet Premier |
| 25 | Sat 2 Feb 2013 | 34-2 v Alfreton TownGrimsby Town 4-2 Alfreton Town | Blue Square Bet Premier |
| 26 | Sat 9 Feb 2013 | 31-0 v AFC Telford UnitedGrimsby Town 1-0 AFC Telford United | Blue Square Bet Premier |
| 27 | Tue 19 Feb 2013 | 30-2 v Braintree TownBraintree Town 2-0 Grimsby Town | Blue Square Bet Premier |
| 28 | Tue 5 Mar 2013 | 31-0 v Forest Green RoversForest Green Rovers 0-1 Grimsby Town | Blue Square Bet Premier |
| 29 | Sat 9 Mar 2013 | 31-3 v Kidderminster HarriersGrimsby Town 1-3 Kidderminster Harriers | Blue Square Bet Premier |
| 30 | Tue 12 Mar 2013 | 30-2 v Mansfield TownMansfield Town 2-0 Grimsby Town | Blue Square Bet Premier |
| 31 | Sat 16 Mar 2013 | 30-1 v Cambridge UnitedGrimsby Town 0-1 Cambridge United | Blue Square Bet Premier |
| 32 | Tue 19 Mar 2013 | 30-1 v Nuneaton TownNuneaton Town 1-0 Grimsby Town | Blue Square Bet Premier |
| 33 | Tue 26 Mar 2013 | 31-1 v GatesheadGateshead 1-1 Grimsby Town | Blue Square Bet Premier |
| 34 | Sat 30 Mar 2013 | 30-0 v BarrowGrimsby Town 0-0 Barrow | Blue Square Bet Premier |
| 35 | Wed 3 Apr 2013 | 33-1 v Macclesfield TownMacclesfield Town 1-3 Grimsby Town | Blue Square Bet Premier |
| 36 | Sat 6 Apr 2013 | 32-2 v SouthportGrimsby Town 2-2 Southport | Blue Square Bet Premier |
| 37 | Tue 9 Apr 2013 | 32-1 v DartfordDartford 1-2 Grimsby Town | Blue Square Bet Premier |
| 38 | Fri 12 Apr 2013 | 31-1 v Luton TownLuton Town 1-1 Grimsby Town | Blue Square Bet Premier |
| 39 | Sat 20 Apr 2013 | 33-0 v Newport CountyGrimsby Town 3-0 Newport County | Blue Square Bet Premier |
| 40 | Wed 24 Apr 2013 | 30-1 v Newport CountyGrimsby Town 0-1 Newport County | Blue Square Bet Premier Play-off Semi Final |
| 41 | Sun 28 Apr 2013 | 30-1 v Newport CountyNewport County 1-0 Grimsby Town | Blue Square Bet Premier Play-off Semi Final |
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