Home History
| Republic of Ireland Leinster Senior League | 2018/05/28 18:00 | Portmarnock AFC v Newbridge Town FC | W | 3-1 |
| 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 | 2018/05/20 10:00 | Killester Donnycarney FC v Portmarnock AFC | L | 3-2 |
| Republic of Ireland Leinster Senior League | 2018/05/16 18:00 | Portmarnock AFC v Sacred Heart Firhouse Clover | W | 4-3 |
| Republic of Ireland Leinster Senior League | 2018/05/02 18:47 | Bangor Celtic FC v Portmarnock AFC | D | 1-1 |
| Republic of Ireland Leinster Senior League | 2018/04/18 17:45 | Bluebell United v Portmarnock AFC | L | 3-2 |
| Republic of Ireland Leinster Senior League | 2018/04/15 13:43 | Crumlin United v Portmarnock AFC | W | 0-1 |
| Republic of Ireland Leinster Senior League | 2018/03/25 10:02 | Portmarnock AFC v Crumlin United | L | 2-4 |
Away History
| Republic of Ireland Leinster Senior League | 2018/04/15 10:03 | Glenville v Ballymun United | L | 1-0 |
| Republic of Ireland Leinster Senior League | 2018/02/18 11:00 | UCD AFC v Ballymun United | W | 0-1 |
| Republic of Ireland Leinster Senior Cup | 2018/02/14 20:00 | St Patricks CY FC v Ballymun United | L | 2-0 |
| Republic of Ireland Leinster Senior Cup | 2018/01/28 14:09 | UCD v Ballymun United | D | 1-1 |
| Republic of Ireland Leinster Senior League | 2018/01/19 20:04 | Tolka Rovers v Ballymun United | D | 0-0 |