| 1. Round | 21/08/2021 | King's Lynn | - | Southend United | 0:1 | ||||
| 2. Round | 28/08/2021 | Yeovil Town | - | King's Lynn | 1:2 | ||||
| 3. Round | 30/08/2021 | King's Lynn | - | Chesterfield FC | 0:2 |  |
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| 4. Round | 04/09/2021 | Eastleigh FC | - | King's Lynn | 3:3 | |
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| 8. Round | 25/09/2021 | King's Lynn | - | Wealdstone FC | 0:1 | ||||
| 6. Round | 28/09/2021 | Altrincham FC | - | King's Lynn | 4:1 | |
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| 9. Round | 02/10/2021 | Maidenhead United | - | King's Lynn | 2:3 | |
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| 10. Round | 05/10/2021 | King's Lynn | - | Barnet FC | 1:1 | ||||
| 11. Round | 09/10/2021 | King's Lynn | - | Solihull Moors | 0:1 | ||||
| 12. Round | 23/10/2021 | Torquay United | - | King's Lynn | 2:0 | ||||
| 13. Round | 26/10/2021 | King's Lynn | - | Boreham Wood | 0:1 | ||||
| 14. Round | 30/10/2021 | Weymouth FC | - | King's Lynn | 1:0 | ||||
| 15. Round | 13/11/2021 | King's Lynn | - | Wrexham AFC | 2:6 | ||||
| 18. Round | 27/11/2021 | King's Lynn | - | Aldershot Town | 0:1 |
Ireland