| 2008 | ||
|---|---|---|
| Total votantes | 25.752.839 | 76,03% |
| Abstención | 8.120.062 | 23,97% |
| Papeletas nulas | 580.989 | 2,26% |
| Papeletas en blanco | 519.409 | 2,02% |
| 2008 | 2004 | |||
|---|---|---|---|---|
| Siglas | Senadores | Senadores | Siglas | |
| P.P. | 101 | 102 | PP | |
| P.S.O.E. | 89 | 81 | PSOE | |
| PSC-ERC-ICV-EUiA | 12 | 12 | PSC-ERC-ICV-EUA | |
| CiU | 4 | 4 | CiU | |
| EAJ-PNV | 2 | 6 | EAJ-PNV | |
| CC-PNC | 3 | CC | ||