Head to Head
| Republic of Ireland Leinster Senior League | 2019/08/21 18:45 | St Mochtas v Portmarnock AFC | L | 3-1 |
| Republic of Ireland Leinster Senior League | 2018/09/07 18:45 | St Mochtas v Portmarnock AFC | L | 4-0 |
| Republic of Ireland Leinster Senior League | 2018/05/23 18:45 | St Mochtas v Portmarnock AFC | W | 0-2 |
| Republic of Ireland Leinster Senior League | 2017/09/24 10:02 | Portmarnock AFC v St Mochtas | W | 2-1 |
Home History
| 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 |
| Republic of Ireland Leinster Senior League | 2020/02/26 19:45 | Malahide Utd v Portmarnock AFC | L | 4-0 |
Away History
| Republic of Ireland Leinster Senior League | 2020/08/20 18:00 | Glenville v St Mochtas | W | 1-4 |
| Republic of Ireland Leinster Senior League | 2020/08/12 18:00 | Ballymun United v St Mochtas | W | 0-5 |
| Republic of Ireland Leinster Senior League | 2020/08/09 10:00 | Cherry Orchard v St Mochtas | W | 0-1 |
| Republic of Ireland Leinster Senior League | 2020/08/06 18:45 | St Mochtas v Home Farm FC | W | 6-1 |
| Republic of Ireland Leinster Senior League | 2020/08/05 18:45 | St Mochtas v Wayside Celtic | W | 2-1 |
| Republic of Ireland Leinster Senior League | 2020/07/30 18:45 | Templeogue United FC v St Mochtas | W | 2-3 |
| Republic of Ireland Leinster Senior League | 2020/07/29 18:45 | St Mochtas v Newbridge Town FC | W | 5-0 |
| Republic of Ireland Leinster Senior League | 2020/03/04 19:45 | St Mochtas v Killester Donnycarney FC | W | 2-1 |