| Republic of Ireland Leinster Senior League | 2021/09/05 10:00 | Tek United v Usher Celtic | W | 1-6 |
| Republic of Ireland Leinster Senior League | 2021/08/30 19:00 | Larkview Boys v Usher Celtic | D | 1-1 |
| Republic of Ireland FAI Cup | 2021/07/25 10:00 | Killester Donnycarney FC v Usher Celtic | L | 1-0 |
| Republic of Ireland Leinster Senior League | 2021/07/17 13:30 | Portlaoise AFC v Usher Celtic | D | 2-2 |
| Republic of Ireland Leinster Senior League | 2020/08/06 18:45 | Usher Celtic v Rush Athletic | W | 2-1 |
| Republic of Ireland Leinster Senior League | 2019/12/18 19:30 | Usher Celtic v Sheriff YC | W | 2-1 |
| Republic of Ireland Leinster Senior Cup | 2018/10/25 18:45 | Fairview Athletic v Usher Celtic | W | 0-5 |
| Republic of Ireland Leinster Senior Cup | 2018/02/18 12:00 | Bluebell United v Usher Celtic | L | 3-2 |
| Republic of Ireland Leinster Senior League | 2021/08/29 10:00 | Dunboyne AFC v Castleknock Celtic | D | 0-0 |
| Republic of Ireland Leinster Senior League | 2021/08/12 18:45 | Inchicore Athletic FC v Castleknock Celtic | L | 3-0 |
| Republic of Ireland Leinster Senior League | 2020/09/11 18:45 | Castleknock Celtic v Ratoath Harps | D | 3-3 |
| Republic of Ireland Leinster Senior League | 2020/09/09 18:45 | Castleknock Celtic v Broadford Rovers | W | 6-2 |
| Republic of Ireland FAI Intermediate Cup | 2019/12/06 20:00 | Castleknock Celtic v Bangor Celtic FC | L | 0-4 |
| Republic of Ireland Leinster Senior League | 2019/09/19 18:45 | St Francis FC v Castleknock Celtic | L | 3-0 |
| Republic of Ireland Leinster Senior League | 2019/03/05 20:00 | Larkview Boys v Castleknock Celtic | W | 1-2 |
| Republic of Ireland Leinster Senior League | 2019/01/14 20:00 | Larkview Boys v Castleknock Celtic | L | 3-0 |