Home History
| Republic of Ireland Leinster Senior Cup | 2018/09/26 19:00 | Swords Celtic FC v Leixlip United | W | 3-5 |
| Europe Friendlies | 2018/08/01 19:00 | Leixlip United v St Patricks CY FC | L | 0-3 |
| Republic of Ireland Leinster Senior League | 2018/05/09 19:00 | Newbridge Town FC v Leixlip United | L | 2-1 |
| Republic of Ireland Leinster Senior League | 2018/04/25 18:45 | Leixlip United v Malahide Utd | D | 1-1 |
| Republic of Ireland Leinster Senior League | 2018/04/22 09:59 | Killester Donnycarney FC v Leixlip United | L | 3-0 |
| Republic of Ireland Leinster Senior League | 2018/04/11 19:02 | St Patricks CY FC v Leixlip United | W | 1-2 |
| Republic of Ireland Leinster Senior League | 2018/04/07 18:04 | Drumcondra v Leixlip United | D | 2-2 |
| Republic of Ireland Leinster Senior League | 2018/04/04 19:00 | Greystones v Leixlip United | L | 3-1 |
Away History
| Republic of Ireland Leinster Senior League | 2018/11/23 19:51 | Bangor Celtic FC v Portmarnock AFC | L | 2-1 |
| Republic of Ireland Leinster Senior League | 2018/11/18 11:00 | Killester Donnycarney FC v Portmarnock AFC | L | 3-2 |
| Republic of Ireland Leinster Senior League | 2018/10/14 11:00 | Crumlin United v Portmarnock AFC | L | 3-1 |
| Republic of Ireland Leinster Senior League | 2018/09/23 10:00 | Portmarnock AFC v Bangor Celtic FC | W | 3-0 |
| Republic of Ireland Leinster Senior League | 2018/09/16 11:00 | Bluebell United v Portmarnock AFC | L | 1-0 |
| 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 | 2018/08/29 17:45 | Portmarnock AFC v Ballymun United | W | 2-1 |
| Club Friendly List | 2018/07/19 18:15 | Sheriff YC v Portmarnock AFC | D | 1-1 |