| 27. Round | 06/01/2018 | Northampton Town | - | Southend United | 3:1 | ||||
| 28. Round | 13/01/2018 | Bradford City | - | Northampton Town | 1:2 | ||||
| 29. Round | 20/01/2018 | Northampton Town | - | Milton Keynes Dons | 2:1 |  |
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| 31. Round | 03/02/2018 | Northampton Town | - | Rochdale AFC | 0:1 | ||||
| 32. Round | 10/02/2018 | AFC Wimbledon | - | Northampton Town | 1:3 | ||||
| 33. Round | 13/02/2018 | Northampton Town | - | Gillingham FC | 1:2 |  |
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| 35. Round | 24/02/2018 | Northampton Town | - | Oxford United | 0:0 | ||||
| 37. Round | 10/03/2018 | Bristol Rovers | - | Northampton Town | 1:1 | |
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| 38. Round | 17/03/2018 | Northampton Town | - | Rotherham United | 0:3 | ||||
| 42. Round | 20/03/2018 | Northampton Town | - | Shrewsbury Town | 1:1 | ||||
| 39. Round | 24/03/2018 | Fleetwood Town | - | Northampton Town | 2:0 | ||||
| 40. Round | 30/03/2018 | Northampton Town | - | Charlton Athletic | 0:4 | |
Portugal