| Primera RFEF Grupo 1 | Matches | W | D | L |  |
 |
 |
| home | 1 | - | 1 | - | 1 | - | - |
| away | - | - | - | - | - | - | - |
| overall | 1 | - | 1 | - | 1 | - | - |
| Primera RFEF Grupo 2 | Matches | W | D | L | |
|
|
| home | 1 | 1 | - | - | 2 | 1 | - |
| away | - | - | - | - | - | - | - |
| overall | 1 | 1 | - | - | 2 | 1 | - |
| Segunda B Grupo 2 | Matches | W | D | L | |
|
|
| home | 3 | 2 | 1 | - | 5 | - | - |
| away | 4 | 2 | - | 2 | 11 | 1 | - |
| overall | 7 | 4 | 1 | 2 | 16 | 1 | - |
| Primera RFEF Grupo 1 | Home | - | Guest | |
|
|
Results |
| 16/04/22 | Real Unión | - | Athletic Club B | 1 | - | - | 1:1 |
| Primera RFEF Grupo 2 | Home | - | Guest | |
|
|
Results |
| 22/04/23 | Real Unión | - | Athletic Club B | 2 | 1 | - | 2:1 |
| Segunda B Grupo 2 | Home | - | Guest | |
|
|
Results |
| 24/01/15 | Real Unión | - | Real Sociedad B | 1 | - | - | 4:0 |
| 10/05/15 | UB Conquense | - | Real Unión | 4 | - | - | 3:1 |
| 29/10/16 | Real Unión | - | UD Socuéllamos | 2 | - | - | 1:1 |
| 07/10/18 | Real Unión | - | Real Sociedad B | 2 | - | - | 2:1 |
| 26/01/19 | SD Leioa | - | Real Unión | 2 | - | - | 0:1 |
| 24/11/19 | CD Izarra | - | Real Unión | 3 | 1 | - | 0:1 |
| 21/03/21 | Club Portugalete | - | Real Unión | 2 | - | - | 2:0 |
Spain