Head to Head
| Northern Ireland Premier | 2021/04/03 14:00 | Glentoran v Portadown | W | 4-0 |
| Northern Ireland Premier | 2021/02/16 19:30 | Portadown v Glentoran | W | 1-3 |
| Northern Ireland Premier | 2021/01/02 17:30 | Glentoran v Portadown | W | 2-1 |
| Europe Friendlies | 2020/09/15 18:30 | Glentoran v Portadown | W | 3-1 |
| Northern Ireland Cup | 2020/01/04 15:00 | Glentoran v Portadown | W | 7-6 |
| Northern Ireland Premier | 2017/04/22 14:00 | Glentoran v Portadown | W | 3-0 |
| Northern Ireland Premier | 2017/01/03 19:45 | Portadown v Glentoran | W | 0-5 |
| Northern Ireland Premier | 2016/11/05 15:00 | Glentoran v Portadown | D | 0-0 |
Home History
| Northern Ireland Premier | 2021/10/16 16:30 | Glentoran v Coleraine | D | 2-2 |
| Northern Ireland League Cup | 2021/10/13 18:45 | Glenavon v Glentoran | W | 6-7 |
| Northern Ireland Premier | 2021/10/02 14:00 | Glenavon v Glentoran | W | 1-2 |
| Northern Ireland Premier | 2021/09/28 18:45 | Glentoran v Linfield | L | 0-3 |
| Northern Ireland Premier | 2021/09/25 14:00 | Glentoran v Crusaders | L | 0-3 |
| Northern Ireland Premier | 2021/09/18 14:00 | Warrenpoint Town v Glentoran | W | 0-3 |
| Northern Ireland League Cup | 2021/09/14 18:45 | Glentoran v Banbridge Town | W | 5-0 |
| Northern Ireland Premier | 2021/09/10 18:45 | Glentoran v Ballymena Utd | W | 4-1 |
Away History
| Northern Ireland Premier | 2021/10/16 14:00 | Portadown v Ballymena Utd | L | 0-1 |
| Northern Ireland Premier | 2021/10/02 14:00 | Warrenpoint Town v Portadown | W | 2-3 |
| Northern Ireland Premier | 2021/09/25 14:00 | Portadown v Dungannon Swifts | L | 1-4 |
| Northern Ireland Premier | 2021/09/18 14:00 | Carrick Rangers v Portadown | L | 1-0 |
| Northern Ireland League Cup | 2021/09/14 18:45 | Portadown v Newington FC | W | 2-0 |
| Northern Ireland Premier | 2021/09/11 14:00 | Portadown v Linfield | L | 2-3 |
| Northern Ireland Premier | 2021/09/04 14:00 | Portadown v Larne FC | L | 2-3 |
| Northern Ireland Premier | 2021/08/31 18:45 | Crusaders v Portadown | L | 4-0 |