| 2009 | 2005 | |||||
| Partidos | Votos | Porcentaje | Diputados | Votos | Porcentaje | Diputados |
| EAJ-PNV | 110942 | 36.94% | 10 | 148884 | 38.31% | 10 |
| PSE-EE/PSOE | 91799 | 30.56% | 8 | 78871 | 20.29% | 5 |
| PP | 31817 | 10.59% | 3 | 51780 | 13.32% | 3 |
| ARALAR | 31043 | 10.34% | 2 | 15396 | 3.96% | 1 |
| EA | 15752 | 5.24% | 1 | - | - | - |
| EB-B | 11098 | 3.7% | 1 | 20388 | 5.24% | 1 |
| UPD | 5227 | 1.74% | 0 | - | - | - |
| POSI | 0 | 0% | 0 | 621 | 0.16% | 0 |
| PH | 0 | 0% | 0 | 500 | 0.13% | 0 |
| EKA-PC | 0 | 0% | 0 | - | - | - |
| PACMA/ZAAAA | 0 | 0% | 0 | - | - | - |
| PUM+J | 0 | 0% | 0 | 0 | 0% | 0 |
| PFyV | 0 | 0% | 0 | - | - | - |
| BERDEAK-LV | 0 | 0% | 0 | - | - | - |
| PCTV-EHAK | NP | - | - | 70834 | 18.22% | 5 |
| BERDEAK-PACMA | NP | - | - | 1333 | 0.34% | 0 |
| UAL | NP | - | - | 136 | 0.03% | 0 |
| EKA | NP | - | - | 0 | 0% | 0 |
| Total votos | Participación | Abstención | Votos blancos | Votos nulos | Diputados | |||||
| 2009 | 351927 | 63.06% | 223059 | 36.94% | 3781 | 1.07% | 47803 | 13.58% | 25 | |
| 2005 | 392776 | 67.62% | 188122 | 32.38% | 2851 | 0.73% | 1182 | 0.3% | 25 | |