| Election For | Date | Votes | Registered Voters | Turn Out |
|---|---|---|---|---|
| Spanish Senate | 2000-03-12 | 23,125,773 | 33,045,318 | 69.98% |
| Spanish Congress of Deputies | 2000-03-12 | 23,125,773 | 33,045,318 | 69.98% |
| Spanish Senate | 2004-03-14 | 23,382,667 | 33,969,640 | 68.83% |
| Spanish Congress of Deputies | 2004-03-14 | 26,155,436 | 34,571,831 | 75.66% |
| Referendum | 2005-02-20 | 14,204,663 | 33,563,680 | 42.32% |
| Spanish Congress of Deputies | 2008-03-09 | 25,900,442 | 35,073,179 | 73.85% |
| Spanish Senate | 2008-03-09 | 25,752,839 | 33,875,268 | 76.02% |
| Spanish Congress of Deputies | 2011-11-20 | 24,666,441 | 35,779,491 | 68.94% |
| Spanish Senate | 2011-11-20 | 24,483,672 | 35,779,491 | 68.43% |
| Spanish Senate | 2015-12-20 | 24,869,217 | 34,631,086 | 71.81% |
| Spanish Congress of Deputies | 2015-12-20 | 25,350,447 | 34,631,086 | 73.2% |
| Spanish Senate | 2016-06-26 | 23,799,958 | 34,476,802 | 69.03% |
| Spanish Congress of Deputies | 2016-06-26 | 24,161,083 | 34,597,038 | 69.84% |
| Spanish Congress of Deputies | 2019-04-28 | 26,361,051 | 34,798,204 | 75.75% |
| Spanish Senate | 2019-04-28 | 26,055,457 | 34,551,765 | 75.41% |
| Spanish Congress of Deputies | 2019-11-10 | 24,831,865 | 35,338,068 | 70.27% |
| Spanish Senate | 2019-11-10 | 25,199,906 | 35,789,402 | 70.41% |
| Spanish Senate | 2023-07-23 | - | 41,932,488 | - |
| Spanish Congress of Deputies | 2023-07-23 | - | 41,932,488 | - |