Head to Head
| Spain Segunda B Group 2 | 2021/01/24 16:00 | Real Unión v Leioa | L | 5-0 |
| Spain Segunda B Group 2 | 2020/10/25 16:00 | Leioa v Real Unión | L | 0-1 |
| Spain Segunda B Group 2 | 2019/12/01 16:00 | Real Unión v Leioa | D | 0-0 |
| Spain Segunda B Group 2 | 2019/01/26 15:00 | Leioa v Real Unión | L | 0-1 |
| Spain Segunda B Group 2 | 2018/09/09 16:00 | Real Unión v Leioa | W | 1-2 |
| Spain Segunda B Group 2 | 2018/04/07 16:00 | Leioa v Real Unión | D | 0-0 |
| Spain Segunda B Group 2 | 2017/11/12 16:00 | Real Unión v Leioa | W | 1-3 |
| Spain Segunda B Group 2 | 2017/02/18 15:00 | Leioa v Real Unión | W | 2-0 |
Home History
| Europe Friendlies | 2022/08/06 09:30 | Leioa v Gernika | W | 2-1 |
| Spain Tercera Group 4 | 2022/04/30 16:00 | Leioa v SD Beasain | D | 3-3 |
| Spain Tercera Group 4 | 2022/04/23 16:00 | Santutxu v Leioa | W | 1-3 |
| Spain Tercera Group 4 | 2022/04/13 18:00 | Leioa v SD Deusto | D | 2-2 |
| Spain Tercera Group 4 | 2022/04/09 15:00 | Lagun Onak v Leioa | L | 1-0 |
| Spain Tercera Group 4 | 2022/04/02 15:30 | Leioa v CD Vitoria | L | 0-2 |
| Spain Tercera Group 4 | 2022/03/26 16:00 | Amurrio v Leioa | D | 0-0 |
| Spain Tercera Group 4 | 2022/03/19 16:30 | Leioa v Pasaia KE | D | 0-0 |
Away History
| Spain Primera Division RFEF Group 2 | 2022/08/28 10:00 | Real Unión v UE Cornella | W | 2-0 |
| Europe Friendlies | 2022/08/06 09:30 | Real Unión v Real Sociedad B | W | 2-1 |
| Europe Friendlies | 2022/07/31 17:00 | Real Madrid B v Real Unión | D | 1-1 |
| Spain Primera Division RFEF Group 1 | 2022/05/28 16:30 | Real Unión v Tudelano | W | 3-1 |
| Spain Primera Division RFEF Group 1 | 2022/05/14 17:00 | Real Unión v CF Talavera | W | 3-1 |
| Spain Primera Division RFEF Group 1 | 2022/05/08 15:00 | CF Internacional de Madrid v Real Unión | L | 2-0 |
| Spain Primera Division RFEF Group 1 | 2022/05/01 10:00 | Real Unión v Rayo Majadahonda | W | 1-0 |
| Spain Primera Division RFEF Group 1 | 2022/04/24 10:00 | Unionistas de Salamanca CF v Real Unión | L | 2-1 |