Home History
| 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 |
| Republic of Ireland Leinster Senior League | 2020/07/29 18:00 | Portmarnock AFC v Malahide Utd | L | 1-3 |
| Republic of Ireland Leinster Senior League | 2020/07/26 10:02 | Portmarnock AFC v Maynooth University Town FC | L | 0-3 |
| Republic of Ireland Leinster Senior League | 2020/07/22 18:00 | Portmarnock AFC v Ballymun United | L | 2-3 |
| Republic of Ireland Leinster Senior League | 2020/07/20 18:00 | Seaford Rock United v Portmarnock AFC | D | 2-2 |
Away History
| Republic of Ireland Leinster Senior League | 2020/08/25 18:45 | St James's Gate FC v Rush Athletic | W | 0-5 |
| Republic of Ireland Leinster Senior League | 2020/08/06 18:45 | Usher Celtic v Rush Athletic | L | 2-1 |