Head to Head
| 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 |
| Northern Ireland Premier | 2016/08/20 14:00 | Portadown v Glentoran | W | 0-1 |
Home History
| Northern Ireland Premier | 2021/03/27 15:00 | Glentoran v Crusaders | W | 1-0 |
| Northern Ireland Premier | 2021/03/23 19:45 | Warrenpoint Town v Glentoran | W | 1-2 |
| Northern Ireland Premier | 2021/03/20 15:00 | Glentoran v Glenavon | W | 3-1 |
| Northern Ireland Premier | 2021/03/16 19:45 | Glenavon v Glentoran | L | 2-1 |
| Northern Ireland Premier | 2021/03/13 15:00 | Warrenpoint Town v Glentoran | W | 0-2 |
| Northern Ireland Premier | 2021/03/09 19:45 | Glentoran v Ballymena Utd | L | 0-2 |
| Northern Ireland Premier | 2021/03/05 19:30 | Carrick Rangers v Glentoran | W | 0-5 |
| Northern Ireland Premier | 2021/03/02 19:30 | Glentoran v Linfield | W | 3-1 |
Away History
| Northern Ireland Premier | 2021/03/30 18:45 | Portadown v Crusaders | L | 1-2 |
| Northern Ireland Premier | 2021/03/27 17:30 | Portadown v Linfield | L | 0-1 |
| Northern Ireland Premier | 2021/03/23 19:45 | Carrick Rangers v Portadown | L | 5-3 |
| Northern Ireland Premier | 2021/03/20 15:00 | Dungannon Swifts v Portadown | W | 0-1 |
| Northern Ireland Premier | 2021/03/13 15:00 | Ballymena Utd v Portadown | L | 2-1 |
| Northern Ireland Premier | 2021/03/09 19:30 | Portadown v Glenavon | L | 1-2 |
| Northern Ireland Premier | 2021/03/06 15:00 | Portadown v Glenavon | W | 4-1 |
| Northern Ireland Premier | 2021/03/02 19:45 | Coleraine v Portadown | L | 2-0 |