Head to Head
| 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 | W | 0-1 |
| Spain Segunda B Group 2 | 2018/09/09 16:00 | Real Unión v Leioa | L | 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 | L | 1-3 |
| Spain Segunda B Group 2 | 2017/02/18 15:00 | Leioa v Real Unión | L | 2-0 |
| Spain Segunda B Group 2 | 2016/10/02 15:00 | Real Unión v Leioa | W | 2-1 |
| Spain Segunda B Group 2 | 2016/05/15 16:00 | Real Unión v Leioa | L | 0-1 |
Home History
| Spain Segunda B Group 2 | 2020/03/07 15:00 | Athletic Bilbao B v Real Unión | D | 3-3 |
| Spain Segunda B Group 2 | 2020/02/29 15:15 | Valladolid Promesas v Real Unión | L | 1-0 |
| Spain Segunda B Group 2 | 2020/02/23 16:00 | Real Unión v Amorebieta | L | 0-1 |
| Spain Segunda B Group 2 | 2020/02/15 15:00 | Arenas Club de Getxo v Real Unión | D | 0-0 |
| Spain Segunda B Group 2 | 2020/02/09 16:00 | Real Unión v Osasuna B | D | 1-1 |
| Spain Segunda B Group 2 | 2020/02/02 11:00 | Tudelano v Real Unión | D | 2-2 |
| Spain Segunda B Group 2 | 2020/01/26 16:00 | Real Unión v Salamanca CF UDS | L | 0-1 |
| Spain Segunda B Group 2 | 2020/01/19 16:30 | Cultural Leonesa v Real Unión | D | 0-0 |
Away History
| Spain Segunda B Group 2 | 2020/03/07 16:30 | Leioa v Cultural Leonesa | L | 2-4 |
| Spain Segunda B Group 2 | 2020/03/01 17:30 | CD Calahorra v Leioa | D | 0-0 |
| Spain Segunda B Group 2 | 2020/02/22 16:30 | Leioa v Haro Deportivo | D | 2-2 |
| Spain Segunda B Group 2 | 2020/02/16 11:00 | Alaves B v Leioa | D | 0-0 |
| Spain Segunda B Group 2 | 2020/02/08 15:00 | Leioa v Real Sociedad B | L | 0-2 |
| Spain Segunda B Group 2 | 2020/02/02 16:00 | Barakaldo v Leioa | W | 1-2 |
| Spain Segunda B Group 2 | 2020/01/25 16:30 | Leioa v Valladolid Promesas | D | 1-1 |
| Spain Segunda B Group 2 | 2020/01/18 15:00 | Leioa v Izarra | W | 3-1 |