.
| PSOE | PP | Vox | Sumar | Podemos | ERC | SALF | |||
|---|---|---|---|---|---|---|---|---|---|
| 2026-06-01 – 2026-06-11 | Sigma Dos / El Mundo | 26 4% | 32 6% | 17 2% | 7% | 3 4% | 2% | — | (11 4%) |
| 2026-06-01 – 2026-06-04 | CIS | 31 5% | 27 1% | 15 8% | 6 4% | 2 8% | 1 9% | 1 9% | (12 6%) |
| 2026-05-28 – 2026-06-01 | 40dB / Prisa | 27 7% | 32 4% | 17 4% | 6 2% | 2 3% | — | 2 1% | (11 9%) |
| 2026-05-28 – 2026-05-30 | SocioMétrica / El Español | 25 9% | 33 9% | 17 4% | 5 7% | 2 2% | 2 1% | 2 5% | (10 3%) |
| 2026-05-25 – 2026-05-29 | Invymark / laSexta | 27 8% | 33 1% | 17 6% | 5 5% | 3 6% | — | 1 7% | (10 7%) |
| 2026-05-26 – 2026-05-28 | GAD3 / ABC | 26 8% | 33 1% | 17 1% | 5 9% | 3 1% | 2% | 1 4% | (10 6%) |
| 2026-05-27 – 2026-05-28 | Target Point / El Debate | 25 4% | 31 2% | 18 9% | 5 3% | 3 1% | — | 2 1% | (14 0%) |
| 2026-05-25 – 2026-05-27 | NC Report / La Razón | 25 1% | 34 7% | 17 9% | 6 3% | 3 6% | 1 9% | — | (10 5%) |
| 2026-05-20 – 2026-05-22 | DYM / Henneo | 27 7% | 34 8% | 16% | 5 7% | 3 5% | — | 1 1% | (11 2%) |
| 2026-05-04 – 2026-05-18 | CIS | 36 2% | 24 9% | 16 2% | 5 7% | 2 5% | 2 6% | 2 4% | (9 5%) |
:
| 1 335 | 1 357 | 11 547 | |
| 2016 | 50 | 50 | 329 |
| 2017 | 93 | 93 | 609 |
| 2018 | 97 | 97 | 696 |
| 2019 | 185 | 186 | 1 592 |
| 2020 | 112 | 112 | 926 |
| 2021 | 136 | 136 | 1 263 |
| 2022 | 180 | 180 | 1 649 |
| 2023 | 229 | 238 | 1 937 |
| 2024 | 113 | 125 | 1 162 |
| 2025 | 98 | 98 | 987 |
| 2026 | 42 | 42 | 397 |