| Republic of Ireland Leinster Senior League | 2021/10/31 12:00 | Crumlin United v Bangor Celtic FC | L | 5-2 |
| Republic of Ireland Leinster Senior League | 2021/10/08 18:45 | St Mochtas v Bangor Celtic FC | L | 3-0 |
| Republic of Ireland Leinster Senior League | 2021/10/01 19:02 | Maynooth University Town FC v Bangor Celtic FC | L | 2-0 |
| Republic of Ireland Leinster Senior League | 2021/09/19 10:00 | Bangor Celtic FC v Cherry Orchard | W | 1-0 |
| Republic of Ireland Leinster Senior League | 2021/09/15 18:45 | Edenderry Town v Bangor Celtic FC | W | 2-3 |
| Republic of Ireland Leinster Senior League | 2021/09/12 10:00 | Bangor Celtic FC v Sacred Heart Firhouse Clover | W | 3-2 |
| Republic of Ireland Leinster Senior League | 2021/09/05 10:00 | Bangor Celtic FC v Home Farm FC | D | 2-2 |
| Republic of Ireland Leinster Senior League | 2021/08/28 14:00 | Crumlin United v Bangor Celtic FC | L | 7-3 |
| Republic of Ireland Leinster Senior League | 2021/10/24 10:00 | Kilnamanagh AFC v Crumlin United | L | 1-2 |
| Republic of Ireland Amateur Cup | 2021/10/15 19:00 | Home Farm FC v Kilnamanagh AFC | W | 1-3 |
| Republic of Ireland Leinster Senior League | 2021/10/03 10:00 | Kilnamanagh AFC v Malahide Utd | D | 0-0 |
| Republic of Ireland Leinster Senior League | 2021/09/26 10:00 | Kilnamanagh AFC v Liffey Wanderers | D | 3-3 |
| Republic of Ireland Leinster Senior League | 2021/09/12 10:00 | Kilnamanagh AFC v Wayside Celtic | D | 3-3 |
| Republic of Ireland Leinster Senior League | 2021/09/09 18:45 | Glebe North FC v Kilnamanagh AFC | W | 0-2 |
| Republic of Ireland Leinster Senior League | 2021/09/05 10:00 | Kilnamanagh AFC v Sacred Heart Firhouse Clover | L | 1-4 |
| Republic of Ireland FAI Cup | 2021/08/27 18:45 | Waterford FC v Kilnamanagh AFC | L | 4-1 |