Head to Head
| Spain Primera Division RFEF Group 2 | 2023/02/11 18:00 | Real Sociedad B v Real Unión | W | 2-0 |
| Spain Primera Division RFEF Group 2 | 2022/10/22 17:00 | Real Unión v Real Sociedad B | W | 0-1 |
| Europe Friendlies | 2022/08/06 09:30 | Real Unión v Real Sociedad B | L | 2-1 |
| Spain Segunda B Group 2 | 2021/02/20 17:30 | Real Unión v Real Sociedad B | L | 3-1 |
| Spain Segunda B Group 2 | 2020/11/22 11:00 | Real Sociedad B v Real Unión | L | 0-1 |
| Spain Segunda B Group 2 | 2019/12/15 16:00 | Real Unión v Real Sociedad B | D | 2-2 |
| Europe Friendlies | 2019/08/03 09:30 | Real Sociedad B v Real Unión | W | 1-0 |
| Spain Segunda B Group 2 | 2019/02/24 17:00 | Real Sociedad B v Real Unión | W | 2-1 |
Home History
| Europe Friendlies | 2023/08/09 17:00 | Real Sociedad B v Sestao River | W | 1-0 |
| Club Friendly List | 2023/08/05 17:00 | Real Sociedad B v Alaves B | D | 0-0 |
| Europe Friendlies | 2023/07/29 17:00 | Numancia v Real Sociedad B | L | 4-0 |
| Spain Primera Division RFEF Play-Offs | 2023/06/10 17:00 | Alcorcon v Real Sociedad B | D | 1-1 |
| Spain Primera Division RFEF Play-Offs | 2023/06/03 17:00 | Real Sociedad B v Alcorcon | L | 1-2 |
| Spain Primera Division RFEF Group 2 | 2023/05/27 17:30 | Real Sociedad B v CD Castellon | D | 1-1 |
| Spain Primera Division RFEF Group 2 | 2023/05/20 17:30 | Osasuna B v Real Sociedad B | W | 0-1 |
| Spain Primera Division RFEF Group 2 | 2023/05/14 14:00 | Real Sociedad B v UD Logrones | D | 0-0 |
Away History
| Europe Friendlies | 2023/08/12 09:30 | Alaves B v Real Unión | W | 0-1 |
| Europe Friendlies | 2023/08/05 17:00 | Sestao River v Real Unión | W | 0-1 |
| Club Friendly List | 2023/08/02 17:00 | Real Unión v Bordeaux II | D | 1-1 |
| Europe Friendlies | 2023/07/29 17:00 | Real Unión v SD Logrones | W | 4-0 |
| Europe Friendlies | 2023/07/22 09:30 | Real Unión v Eibar | L | 0-1 |
| Spain Primera Division RFEF Group 2 | 2023/05/27 17:30 | Real Unión v La Nucia | W | 2-0 |
| Spain Primera Division RFEF Group 2 | 2023/05/20 17:30 | CD Castellon v Real Unión | D | 1-1 |
| Spain Primera Division RFEF Group 2 | 2023/05/14 10:00 | Real Unión v Atletico Baleares | W | 2-0 |