| 1 | Sat 3 Nov 2012 | 261-0 v TamworthTamworth 0-1 Grimsby Town | Blue Square Bet Premier |
| 2 | Tue 6 Nov 2012 | 262-3 v HydeHyde 3-2 Grimsby Town | Blue Square Bet Premier |
| 3 | Sat 10 Nov 2012 | 265-1 v WokingGrimsby Town 5-1 Woking | Blue Square Bet Premier |
| 4 | Sat 17 Nov 2012 | 263-0 v Braintree TownGrimsby Town 3-0 Braintree Town | Blue Square Bet Premier |
| 5 | Sat 1 Dec 2012 | 261-1 v Ebbsfleet UnitedEbbsfleet United 1-1 Grimsby Town | Blue Square Bet Premier |
| 6 | Sat 8 Dec 2012 | 262-0 v TamworthGrimsby Town 2-0 Tamworth | Blue Square Bet Premier |
| 7 | Fri 21 Dec 2012 | 261-0 v WrexhamGrimsby Town 1-0 Wrexham | Blue Square Bet Premier |
| 8 | Wed 26 Dec 2012 | 264-1 v Lincoln CityLincoln City 1-4 Grimsby Town | Blue Square Bet Premier |
| 9 | Tue 1 Jan 2013 | 261-1 v Lincoln CityGrimsby Town 1-1 Lincoln City | Blue Square Bet Premier |
| 10 | Sat 5 Jan 2013 | 261-1 v Hereford UnitedGrimsby Town 1-1 Hereford United | Blue Square Bet Premier |
| 11 | Sat 26 Jan 2013 | 260-0 v Cambridge UnitedCambridge United 0-0 Grimsby Town | Blue Square Bet Premier |
| 12 | Sat 2 Feb 2013 | 264-2 v Alfreton TownGrimsby Town 4-2 Alfreton Town | Blue Square Bet Premier |
| 13 | Sat 9 Feb 2013 | 261-0 v AFC Telford UnitedGrimsby Town 1-0 AFC Telford United | Blue Square Bet Premier |
| 14 | Tue 19 Feb 2013 | 260-2 v Braintree TownBraintree Town 2-0 Grimsby Town | Blue Square Bet Premier |
| 15 | Tue 26 Feb 2013 | 263-1 v Ebbsfleet UnitedGrimsby Town 3-1 Ebbsfleet United | Blue Square Bet Premier |
| 16 | Tue 5 Mar 2013 | 261-0 v Forest Green RoversForest Green Rovers 0-1 Grimsby Town | Blue Square Bet Premier |
| 17 | Sat 9 Mar 2013 | 261-3 v Kidderminster HarriersGrimsby Town 1-3 Kidderminster Harriers | Blue Square Bet Premier |
| 18 | Tue 12 Mar 2013 | 260-2 v Mansfield TownMansfield Town 2-0 Grimsby Town | Blue Square Bet Premier |
| 19 | Sat 16 Mar 2013 | 260-1 v Cambridge UnitedGrimsby Town 0-1 Cambridge United | Blue Square Bet Premier |
| 20 | Tue 19 Mar 2013 | 260-1 v Nuneaton TownNuneaton Town 1-0 Grimsby Town | Blue Square Bet Premier |
| 21 | Tue 26 Mar 2013 | 261-1 v GatesheadGateshead 1-1 Grimsby Town | Blue Square Bet Premier |
| 22 | Mon 1 Apr 2013 | 262-1 v Stockport CountyStockport County 1-2 Grimsby Town | Blue Square Bet Premier |
| 23 | Sat 6 Apr 2013 | 262-2 v SouthportGrimsby Town 2-2 Southport | Blue Square Bet Premier |
| 24 | Tue 16 Apr 2013 | 261-0 v WokingWoking 0-1 Grimsby Town | Blue Square Bet Premier |
| 25 | Sat 20 Apr 2013 | 263-0 v Newport CountyGrimsby Town 3-0 Newport County | Blue Square Bet Premier |
| 26 | Wed 24 Apr 2013 | 260-1 v Newport CountyGrimsby Town 0-1 Newport County | Blue Square Bet Premier Play-off Semi Final |
| 27 | Sun 28 Apr 2013 | 260-1 v Newport CountyNewport County 1-0 Grimsby Town | Blue Square Bet Premier Play-off Semi Final |
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