| 2009 | 2005 | |||||
| Partidos | Votos | Porcentaje | Diputados | Votos | Porcentaje | Diputados |
| EAJ-PNV | 240015 | 41.53% | 12 | 267247 | 40.97% | 11 |
| PSE-EE/PSOE | 176699 | 30.58% | 8 | 152459 | 23.37% | 6 |
| PP | 81015 | 14.02% | 4 | 114845 | 17.61% | 5 |
| ARALAR | 24586 | 4.25% | 1 | 10242 | 1.57% | 0 |
| EB-B | 19893 | 3.44% | 0 | 36226 | 5.55% | 1 |
| EA | 16801 | 2.91% | 0 | - | - | - |
| UPD | 10801 | 1.87% | 0 | - | - | - |
| POSI | 0 | 0% | 0 | 1499 | 0.23% | 0 |
| PH | 0 | 0% | 0 | 674 | 0.1% | 0 |
| EKA-PC | 0 | 0% | 0 | - | - | - |
| PACMA/ZAAAA | 0 | 0% | 0 | - | - | - |
| PUM+J | 0 | 0% | 0 | 1261 | 0.19% | 0 |
| PFyV | 0 | 0% | 0 | - | - | - |
| BERDEAK-LV | 0 | 0% | 0 | - | - | - |
| PCTV-EHAK | NP | - | - | 65623 | 10.06% | 2 |
| BERDEAK-PACMA | NP | - | - | 1865 | 0.29% | 0 |
| EKA | NP | - | - | 179 | 0.03% | 0 |
| UAL | NP | - | - | 216 | 0.03% | 0 |
| Total votos | Participación | Abstención | Votos blancos | Votos nulos | Diputados | |||||
| 2009 | 628154 | 67.58% | 324681 | 32.42% | 6162 | 0.98% | 44073 | 7.02% | 25 | |
| 2005 | 659366 | 67.91% | 311591 | 32.09% | 4866 | 0.74% | 2164 | 0.33% | 25 | |