| 2013-03-05 | Forest GreenvGrimsbyNational League · England | 0–1 | National League · England |
| 2013-02-26 | GrimsbyvEbbsfleetNational League · England | 3–1 | National League · England |
| 2013-02-19 | Braintree TownvGrimsbyNational League · England | 2–0 | National League · England |
| 2013-02-09 | GrimsbyvTelford UnitedNational League · England | 1–0 | National League · England |
| 2013-02-02 | GrimsbyvAlfreton TownNational League · England | 4–2 | National League · England |
| 2013-01-26 | CambridgevGrimsbyNational League · England | 0–0 | National League · England |
| 2013-01-22 | GrimsbyvHyde UnitedNational League · England | 2–0 | National League · England |
| 2013-01-05 | GrimsbyvHerefordNational League · England | 1–1 | National League · England |
| 2013-01-01 | GrimsbyvLincolnNational League · England | 1–1 | National League · England |
| 2012-12-26 | LincolnvGrimsbyNational League · England | 1–4 | National League · England |
| 2012-12-21 | GrimsbyvWrexhamNational League · England | 1–0 | National League · England |
| 2012-12-08 | GrimsbyvTamworthNational League · England | 2–0 | National League · England |
| 2012-12-01 | EbbsfleetvGrimsbyNational League · England | 1–1 | National League · England |
| 2012-11-17 | GrimsbyvBraintree TownNational League · England | 3–0 | National League · England |
| 2012-11-10 | GrimsbyvWokingNational League · England | 5–1 | National League · England |
| 2012-11-06 | Hyde UnitedvGrimsbyNational League · England | 3–2 | National League · England |
| 2012-11-03 | TamworthvGrimsbyNational League · England | 0–1 | National League · England |
| 2012-10-27 | GrimsbyvMacclesfieldNational League · England | 0–1 | National League · England |
| 2012-10-13 | Telford UnitedvGrimsbyNational League · England | 1–2 | National League · England |
| 2012-10-09 | Alfreton TownvGrimsbyNational League · England | 0–2 | National League · England |
| 2012-10-06 | GrimsbyvDartfordNational League · England | 0–2 | National League · England |
| 2012-09-29 | Newport CountyvGrimsbyNational League · England | 0–0 | National League · England |
| 2012-09-25 | GrimsbyvGatesheadNational League · England | 3–0 | National League · England |
| 2012-09-21 | GrimsbyvLutonNational League · England | 4–1 | National League · England |
| 2012-09-15 | KidderminstervGrimsbyNational League · England | 0–0 | National League · England |
| 2012-09-08 | GrimsbyvForest GreenNational League · England | 1–0 | National League · England |
| 2012-09-04 | BarrowvGrimsbyNational League · England | 2–2 | National League · England |
| 2012-09-01 | HerefordvGrimsbyNational League · England | 0–2 | National League · England |
| 2012-08-27 | GrimsbyvMansfieldNational League · England | 4–1 | National League · England |
| 2012-08-25 | WrexhamvGrimsbyNational League · England | 0–0 | National League · England |
| 2012-08-18 | GrimsbyvNuneaton TownNational League · England | 0–0 | National League · England |
| 2012-08-14 | GrimsbyvStockportNational League · England | 1–2 | National League · England |
| 2012-08-11 | SouthportvGrimsbyNational League · England | 1–1 | National League · England |
| 2012-04-28 | GrimsbyvSouthportNational League · England | 0–1 | National League · England |
| 2012-04-21 | AFC Telford UnitedvGrimsbyNational League · England | 0–0 | National League · England |
| 2012-04-14 | WrexhamvGrimsbyNational League · England | 2–2 | National League · England |
| 2012-04-09 | GrimsbyvGatesheadNational League · England | 2–0 | National League · England |
| 2012-04-07 | DarlingtonvGrimsbyNational League · England | 0–0 | National League · England |
| 2012-03-31 | GrimsbyvKidderminsterNational League · England | 1–2 | National League · England |
| 2012-03-27 | TamworthvGrimsbyNational League · England | 1–1 | National League · England |
| 2012-03-24 | LutonvGrimsbyNational League · England | 1–1 | National League · England |
| 2012-03-20 | Hayes & YeadingvGrimsbyNational League · England | 1–2 | National League · England |
| 2012-03-17 | GrimsbyvTamworthNational League · England | 0–0 | National League · England |
| 2012-03-13 | GrimsbyvYorkNational League · England | 2–3 | National League · England |
| 2012-03-10 | GrimsbyvForest GreenNational League · England | 2–1 | National League · England |
| 2012-03-06 | Fleetwood TownvGrimsbyNational League · England | 2–1 | National League · England |
| 2012-03-03 | GrimsbyvBraintree TownNational League · England | 1–1 | National League · England |
| 2012-02-17 | SouthportvGrimsbyNational League · England | 1–2 | National League · England |
| 2012-01-28 | GrimsbyvAFC Telford UnitedNational League · England | 2–0 | National League · England |
| 2012-01-24 | BarrowvGrimsbyNational League · England | 2–2 | National League · England |