| Primera RFEF Grupo 1 | Matches | W | D | L |  |
 |
 |
| home | 1 | - | - | 1 | 1 | 1 | - |
| away | 1 | - | - | 1 | 6 | - | - |
| overall | 2 | - | - | 2 | 7 | 1 | - |
| Primera RFEF Grupo 2 | Matches | W | D | L | |
|
|
| home | 1 | 1 | - | - | 1 | - | - |
| away | 1 | - | 1 | - | 6 | - | - |
| overall | 2 | 1 | 1 | - | 7 | - | - |
| Segunda B Grupo 2 | Matches | W | D | L | |
|
|
| home | 3 | 1 | - | 2 | 8 | - | - |
| away | 3 | - | 1 | 2 | 7 | 1 | - |
| overall | 6 | 1 | 1 | 4 | 15 | 1 | - |
| Primera RFEF Grupo 1 | Home | - | Guest | |
|
|
Results |
| 10/09/21 | Real Unión | - | RC Celta B | 1 | 1 | - | 1:4 |
| 13/04/24 | Sestao River | - | Real Unión | 6 | - | - | 3:1 |
| Primera RFEF Grupo 2 | Home | - | Guest | |
|
|
Results |
| 28/08/22 | Real Unión | - | UE Cornellà | 1 | - | - | 2:0 |
| 06/05/23 | CD Alcoyano | - | Real Unión | 6 | - | - | 1:1 |
| Segunda B Grupo 2 | Home | - | Guest | |
|
|
Results |
| 09/11/14 | Real Unión | - | Barakaldo CF | 1 | - | - | 1:0 |
| 18/01/15 | Sestao River | - | Real Unión | 3 | 1 | - | 2:2 |
| 18/10/15 | Sestao River | - | Real Unión | 1 | - | - | 1:0 |
| 17/11/18 | Real Unión | - | Barakaldo CF | 4 | - | - | 1:2 |
| 19/10/19 | Real Unión | - | Athletic Club B | 3 | - | - | 0:1 |
| 08/11/20 | CD Laredo | - | Real Unión | 3 | - | - | 1:0 |
Spain