Head to Head
| Republic of Ireland Leinster Senior League | 2020/07/22 18:00 | Portmarnock AFC v Ballymun United | W | 2-3 |
| Republic of Ireland Leinster Senior League | 2019/09/08 11:00 | Ballymun United v Portmarnock AFC | L | 1-2 |
| Republic of Ireland Leinster Senior League | 2019/05/05 10:00 | Ballymun United v Portmarnock AFC | W | 3-1 |
| Republic of Ireland Leinster Senior League | 2018/08/29 17:45 | Portmarnock AFC v Ballymun United | L | 2-1 |
Home History
| Republic of Ireland Leinster Senior League | 2021/07/25 10:00 | Ballymun United v Leixlip United | W | 2-1 |
| Republic of Ireland Leinster Senior League | 2021/07/24 13:30 | St John Bosco v Ballymun United | W | 1-3 |
| Republic of Ireland Leinster Senior League | 2021/07/11 10:00 | Ballymun United v Collinstown FC | W | 3-2 |
| Republic of Ireland Leinster Senior League | 2021/07/08 18:45 | Glebe North FC v Ballymun United | D | 0-0 |
| World Club Friendlies | 2021/06/21 18:15 | Mountview CFC v Ballymun United | W | 0-7 |
| Republic of Ireland Leinster Senior League | 2020/09/16 18:45 | Cherry Orchard v Ballymun United | D | 1-1 |
| Republic of Ireland Leinster Senior League | 2020/08/26 17:30 | Crumlin United v Ballymun United | L | 5-2 |
| Republic of Ireland Leinster Senior League | 2020/08/12 18:00 | Ballymun United v St Mochtas | L | 0-5 |
Away History
| Republic of Ireland Leinster Senior League | 2021/07/25 10:00 | Portmarnock AFC v Newbridge Town FC | W | 1-0 |
| Republic of Ireland Leinster Senior League | 2021/07/11 10:00 | Portmarnock AFC v Glenville | D | 0-0 |
| Republic of Ireland Leinster Senior League | 2021/07/05 19:00 | St Patricks CY FC v Portmarnock AFC | W | 0-2 |
| Republic of Ireland Leinster Senior League | 2021/06/13 10:00 | Portmarnock AFC v Rush Athletic | L | 1-4 |
| Republic of Ireland Leinster Senior League | 2020/08/26 17:30 | Portmarnock AFC v St Mochtas | L | 2-5 |
| Republic of Ireland Leinster Senior League | 2020/08/12 18:00 | Portmarnock AFC v Killester Donnycarney FC | L | 0-2 |
| Republic of Ireland Leinster Senior League | 2020/08/09 10:00 | Portmarnock AFC v Crumlin United | L | 1-5 |
| Republic of Ireland Leinster Senior League | 2020/08/05 19:00 | Liffey Wanderers v Portmarnock AFC | D | 3-3 |