Home History
| Northern Ireland Championship | 2022/01/01 15:00 | Institute v Newry City | D | 0-0 |
| Northern Ireland Championship | 2021/12/27 14:00 | Queens University v Institute | W | 0-1 |
| Northern Ireland Championship | 2021/12/18 15:00 | Institute v Ballinamallard Utd | L | 1-2 |
| Northern Ireland Championship | 2021/12/11 15:00 | Institute v Dundela | L | 0-3 |
| Northern Ireland Championship | 2021/12/04 14:00 | Knockbreda v Institute | D | 2-2 |
| Northern Ireland Championship | 2021/11/27 15:00 | Institute v Ards FC | L | 0-3 |
| Northern Ireland Championship | 2021/11/20 15:00 | Institute v Loughgall | L | 0-2 |
| Northern Ireland Championship | 2021/11/13 15:00 | HW Welders v Institute | L | 2-0 |
Away History
| Northern Ireland League Cup | 2021/09/14 18:45 | Glenavon v Portstewart | L | 5-1 |
| UK Friendlies | 2021/07/31 13:00 | Portstewart v Cliftonville | L | 1-3 |
| Club Friendly List | 2021/07/10 13:00 | Portstewart v Knockbreda | L | 1-3 |
| Northern Ireland Cup | 2021/04/27 18:45 | Cliftonville v Portstewart | L | 5-1 |
| Northern Ireland League Cup | 2019/08/27 18:45 | Glenavon v Portstewart | L | 4-1 |
| Northern Ireland Premier Intermediate League | 2019/04/16 17:45 | Sport & Leisure Swifts v Portstewart | W | 0-2 |
| Northern Ireland League Cup | 2018/09/12 18:45 | HW Welders v Portstewart | L | 7-5 |
| Northern Ireland League Cup | 2018/08/28 17:15 | HW Welders v Portstewart | D | 1-1 |