| PP | PSOE | Vox | Sumar | Podemos | SALF | ERC | |||
|---|---|---|---|---|---|---|---|---|---|
| 2026-03-19 – 2026-03-23 | DYM / Henneo | 34 6% | 27 9% | 15 8% | 4 9% | 3 8% | — | — | (13 0%) |
| 2026-03-19 – 2026-03-21 | SocioMétrica / El Español | 31 9% | 26 5% | 18% | 6 6% | 3 6% | 2 5% | 1 9% | (9 0%) |
| 2026-03-02 – 2026-03-06 | CIS | 23 3% | 31 8% | 16 6% | 7 1% | 2 9% | 2 1% | 2 4% | (13 8%) |
| 2026-02-23 – 2026-02-27 | Sigma Dos / El Mundo | 31 9% | 26 4% | 18 3% | 8 4% | 4 1% | — | 1 9% | (9 0%) |
| 2026-02-20 – 2026-02-23 | 40dB / Prisa | 30 2% | 27 7% | 18 8% | 5 9% | 3 3% | 2 3% | — | (11 8%) |
| 2026-02-18 – 2026-02-22 | Ateneo del Dato / elDiario.es | 29 4% | 27 0% | 20 3% | 7 2% | 3 8% | — | — | (12 3%) |
| 2026-02-17 – 2026-02-19 | Target Point / El Debate | 30 5% | 25 8% | 20 3% | 6 7% | 3 7% | 2 4% | — | (10 6%) |
| 2026-02-10 – 2026-02-13 | NC Report / La Razón | 33 1% | 25 9% | 18 1% | 6% | 4 3% | — | 1 8% | (10 8%) |
| 2026-02-11 – 2026-02-13 | SocioMétrica / El Español | 32 1% | 25 0% | 18 4% | 7 2% | 4 2% | 2 5% | — | (10 6%) |
| 2026-02-10 | Data10 / Okdiario | 31 6% | 26 0% | 19 5% | 6 6% | 2 2% | 2 9% | 2 0% | (9 2%) |
:
| 1 314 | 1 336 | 11 342 | |
| 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 | 21 | 21 | 192 |