Head to Head
| Europe Friendlies | 2023/08/16 17:00 | Real Sociedad B v Real Unión | W | 2-1 |
| 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 |
Home History
| Spain Primera Division RFEF Group 1 | 2023/12/09 15:00 | Fuenlabrada v Real Sociedad B | D | 1-1 |
| Spain Primera Division RFEF Group 1 | 2023/12/03 19:00 | Real Sociedad B v Ponferradina | L | 1-2 |
| Spain Primera Division RFEF Group 1 | 2023/11/26 14:30 | Celta Fortuna v Real Sociedad B | W | 1-2 |
| Spain Primera Division RFEF Group 1 | 2023/11/19 11:00 | SD Logrones v Real Sociedad B | W | 0-2 |
| Spain Primera Division RFEF Group 1 | 2023/11/11 17:00 | Real Sociedad B v CD Arenteiro | D | 2-2 |
| Spain Primera Division RFEF Group 1 | 2023/11/05 16:00 | Sabadell v Real Sociedad B | W | 1-2 |
| Spain Primera Division RFEF Group 1 | 2023/10/29 19:00 | Real Sociedad B v Rayo Majadahonda | W | 2-0 |
| Spain Primera Division RFEF Group 1 | 2023/10/22 15:00 | Gimnastic v Real Sociedad B | D | 2-2 |
Away History
| Spain Primera Division RFEF Group 1 | 2023/12/10 11:00 | Real Unión v Osasuna B | L | 2-3 |
| Spain Primera Division RFEF Group 1 | 2023/12/02 19:00 | Cultural Leonesa v Real Unión | L | 2-0 |
| Spain Primera Division RFEF Group 1 | 2023/11/26 11:00 | Real Unión v SD Logrones | L | 0-1 |
| Spain Primera Division RFEF Group 1 | 2023/11/18 17:00 | Real Unión v Gimnastic | D | 1-1 |
| Spain Primera Division RFEF Group 1 | 2023/11/11 16:00 | UE Cornella v Real Unión | L | 3-1 |
| Spain Primera Division RFEF Group 1 | 2023/11/05 15:00 | Real Unión v Deportivo La Coruna | W | 3-0 |
| Spain Primera Division RFEF Group 1 | 2023/10/29 11:00 | Lugo v Real Unión | L | 2-0 |
| Spain Primera Division RFEF Group 1 | 2023/10/22 14:00 | Real Unión v Ponferradina | D | 1-1 |