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| DATE | HOME TEAM | Result | AWAY TEAM | COMPETITION |
| 2nd March 2021 | WATERFORD FC | 1 - 1 | TREATY UTD | Friendly |
| 13/03/2021 | ATHLONE TOWN FC | 0 - 0 | TREATY UTD | Friendly |
| 20/03/2021 | TREATY UTD | 2 - 1 | ATHLONE TOWN FC | Friendly |
| 28/03/2021 | BRAY WANDERERS | 0 - 0 | TREATY UTD | SSE Airtricity League |
| 02/04/2021 | TREATY UTD | 1 - 0 | WEXFORD FC | SSE Airtricity League |
| 09/04/2021 | TREATY UTD | 1 - 1 | COBH RAMBLERS | SSE Airtricity League |
| 16/04/2021 | GALWAY UTD | 1 - 1 | TREATY UTD | SSE Airtricity League |
| 23/04/2021 | TREATY UTD | 2 - 1 | CORK CITY | SSE Airtricity League |
| 30/04/2021 | SHELBOURNE | 2 - 2 | TREATY UTD | SSE Airtricity League |
| 07/05/2021 | UCD | 3 - 2 | TREATY UTD | SSE Airtricity League |
| 14/05/2021 | TREATY UTD | 1 - 0 | ATHLONE TOWN FC | SSE Airtricity League |
| 21/05/2021 | CABINTEELY | 2 - 1 | TREATY UTD | SSE Airtricity League |
| 28/05/2021 | TREATY UTD | 2 - 0 | BRAY WANDERS | SSE Airtricity League |
| 11/06/2021 | WEXFORD FC | 1 - 2 | TREATY UTD | SSE Airtricity League |
| 19/06/2021 | COBH RAMBLERS | 0 - 2 | TREATY UTD | SSE Airtricity League |
| 25/06/2021 | TREATY UTD | 0 - 1 | GALWAY UTD | SSE Airtricity League |
| 02/07/2021 | CORK CITY | 2 - 3 | TREATY UTD | SSE Airtricity League |
| 15/07/2021 | TREATY UTD | 1 - 1 | SHELBOURNE | SSE Airtricity League |
| 16/07/2021 | TREATY UTD | 2 - 1 | UCD | SSE Airtricity League |
| 25/7/2021 | TREATY UTD | 0 - 1 | DUNDALK | FAI Senior Cup |
| 30/07/2021 | ATHLONE TOWN FC | 1 - 4 | TREATY UTD | SSE Airtricity League |
| 06/08/2021 | TREATY UTD | 1 - 4 | CABINTEELY | SSE Airtricity League |
| 13/08/2021 | BRAY WANDERERS | 1 - 0 | TREATY UTD | SSE Airtricity League |
| 20/08/2021 | TREATY UTD | 1 - 1 | WEXFORD FC | SSE Airtricity League |
| 03/09/2021 | TREATY UTD | 3 - 0 | COBH RAMBLERS | SSE Airtricity League |
| 10/09/2021 | GALWAY UTD | 0 - 0 | TREATY UTD | SSE Airtricity League |
| 24/09/2021 | TREATY UTD | 0 - 0 | CORK CITY | SSE Airtricity League |
| 01/10/2021 | SHELBOURNE | 1 - 0 | TREATY UTD | SSE Airtricity League |
| 15/10/2021 | TREATY UTD | 1 - 1 | ATHLONE TOWN FC | SSE AIRTEICITY LEAGUE |
