| 2. Jornada | 02.04.2021 | Treaty United | - | Wexford FC | 1:0 |  |
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| 4. Jornada | 16.04.2021 | Galway United | - | Treaty United | 1:1 | ||||
| 5. Jornada | 23.04.2021 | Treaty United | - | Cork City | 2:1 |  |
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| 6. Jornada | 30.04.2021 | Shelbourne FC | - | Treaty United | 2:2 |  |
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| 7. Jornada | 07.05.2021 | UC Dublin | - | Treaty United | 3:2 | ||||
| 8. Jornada | 14.05.2021 | Treaty United | - | Athlone Town | 1:0 | ||||
| 9. Jornada | 21.05.2021 | Cabinteely FC | - | Treaty United | 2:1 | |
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| 12. Jornada | 19.06.2021 | Cobh Ramblers | - | Treaty United | 0:2 | |
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| 13. Jornada | 25.06.2021 | Treaty United | - | Galway United | 0:1 | |
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| 14. Jornada | 02.07.2021 | Cork City | - | Treaty United | 2:3 | ||||
| 16. Jornada | 16.07.2021 | Treaty United | - | UC Dublin | 2:1 | ||||
| 17. Jornada | 30.07.2021 | Athlone Town | - | Treaty United | 1:4 | ||||
| 18. Jornada | 06.08.2021 | Treaty United | - | Cabinteely FC | 1:4 | |
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| 21. Jornada | 03.09.2021 | Treaty United | - | Cobh Ramblers | 3:0 | ||||
| 22. Jornada | 10.09.2021 | Galway United | - | Treaty United | 0:0 | ||||
| 23. Jornada | 24.09.2021 | Treaty United | - | Cork City | 0:0 | ||||
| 24. Jornada | 01.10.2021 | Shelbourne FC | - | Treaty United | 1:0 | ||||
| 27. Jornada | 29.10.2021 | Cabinteely FC | - | Treaty United | 0:2 |
Irlanda