| 1 | Sat 18 Aug 2012 | 200-0 v Nuneaton TownGrimsby Town 0-0 Nuneaton Town | Blue Square Bet Premier |
| 2 | Sat 25 Aug 2012 | 200-0 v WrexhamWrexham 0-0 Grimsby Town | Blue Square Bet Premier |
| 3 | Sat 1 Sep 2012 | 202-0 v Hereford UnitedHereford United 0-2 Grimsby Town | Blue Square Bet Premier |
| 4 | Tue 4 Sep 2012 | 202-2 v BarrowBarrow 2-2 Grimsby Town | Blue Square Bet Premier |
| 5 | Sat 8 Sep 2012 | 201-0 v Forest Green RoversGrimsby Town 1-0 Forest Green Rovers | Blue Square Bet Premier |
| 6 | Sat 15 Sep 2012 | 200-0 v Kidderminster HarriersKidderminster Harriers 0-0 Grimsby Town | Blue Square Bet Premier |
| 7 | Fri 21 Sep 2012 | 204-1 v Luton TownGrimsby Town 4-1 Luton Town | Blue Square Bet Premier |
| 8 | Tue 25 Sep 2012 | 203-0 v GatesheadGrimsby Town 3-0 Gateshead | Blue Square Bet Premier |
| 9 | Sat 29 Sep 2012 | 200-0 v Newport CountyNewport County 0-0 Grimsby Town | Blue Square Bet Premier |
| 10 | Sat 6 Oct 2012 | 200-2 v DartfordGrimsby Town 0-2 Dartford | Blue Square Bet Premier |
| 11 | Sat 27 Oct 2012 | 200-1 v Macclesfield TownGrimsby Town 0-1 Macclesfield Town | Blue Square Bet Premier |
| 12 | Sat 3 Nov 2012 | 201-0 v TamworthTamworth 0-1 Grimsby Town | Blue Square Bet Premier |
| 13 | Tue 6 Nov 2012 | 202-3 v HydeHyde 3-2 Grimsby Town | Blue Square Bet Premier |
| 14 | Sat 10 Nov 2012 | 205-1 v WokingGrimsby Town 5-1 Woking | Blue Square Bet Premier |
| 15 | Sat 17 Nov 2012 | 203-0 v Braintree TownGrimsby Town 3-0 Braintree Town | Blue Square Bet Premier |
| 16 | Sat 1 Dec 2012 | 201-1 v Ebbsfleet UnitedEbbsfleet United 1-1 Grimsby Town | Blue Square Bet Premier |
| 17 | Sat 8 Dec 2012 | 202-0 v TamworthGrimsby Town 2-0 Tamworth | Blue Square Bet Premier |
| 18 | Fri 21 Dec 2012 | 201-0 v WrexhamGrimsby Town 1-0 Wrexham | Blue Square Bet Premier |
| 19 | Wed 26 Dec 2012 | 204-1 v Lincoln CityLincoln City 1-4 Grimsby Town | Blue Square Bet Premier |
| 20 | Tue 1 Jan 2013 | 201-1 v Lincoln CityGrimsby Town 1-1 Lincoln City | Blue Square Bet Premier |
| 21 | Sat 5 Jan 2013 | 201-1 v Hereford UnitedGrimsby Town 1-1 Hereford United | Blue Square Bet Premier |
| 22 | Tue 22 Jan 2013 | 202-0 v HydeGrimsby Town 2-0 Hyde | Blue Square Bet Premier |
| 23 | Tue 26 Mar 2013 | 201-1 v GatesheadGateshead 1-1 Grimsby Town | Blue Square Bet Premier |
| 24 | Sat 30 Mar 2013 | 200-0 v BarrowGrimsby Town 0-0 Barrow | Blue Square Bet Premier |
| 25 | Mon 1 Apr 2013 | 202-1 v Stockport CountyStockport County 1-2 Grimsby Town | Blue Square Bet Premier |
| 26 | Tue 9 Apr 2013 | 202-1 v DartfordDartford 1-2 Grimsby Town | Blue Square Bet Premier |
| 27 | Fri 12 Apr 2013 | 201-1 v Luton TownLuton Town 1-1 Grimsby Town | Blue Square Bet Premier |
| 28 | Tue 16 Apr 2013 | 201-0 v WokingWoking 0-1 Grimsby Town | Blue Square Bet Premier |
| 29 | Sat 20 Apr 2013 | 203-0 v Newport CountyGrimsby Town 3-0 Newport County | Blue Square Bet Premier |
| 30 | Sun 28 Apr 2013 | 200-1 v Newport CountyNewport County 1-0 Grimsby Town | Blue Square Bet Premier Play-off Semi Final |
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