.
| PSOE | PP | Vox | Sumar | Podemos | ERC | SALF | |||
|---|---|---|---|---|---|---|---|---|---|
| 2026-04-24 – 2026-04-29 | Sigma Dos / El Mundo | 28 4% | 32 3% | 17 2% | 6 9% | 3 5% | 1 9% | — | (9 8%) |
| 2026-04-24 – 2026-04-27 | 40dB / Prisa | 28 4% | 31 3% | 17 9% | 5 7% | 2 5% | — | 2 3% | (11 9%) |
| 2026-04-22 – 2026-04-26 | Ateneo del Dato | 27 5% | 31 7% | 18 4% | 5 6% | 3 8% | — | 2 6% | (10 4%) |
| 2026-04-21 – 2026-04-25 | More in Common | 28% | 31 1% | 17 1% | 7 7% | 2 9% | — | 1 8% | (11 4%) |
| 2026-04-15 – 2026-04-18 | SocioMétrica / El Español | 27 0% | 31 8% | 16 9% | 6 6% | 3 4% | 1 8% | 2 6% | (9 9%) |
| 2026-04-06 – 2026-04-10 | CIS | 36 4% | 23 6% | 14 7% | 5 8% | 2 2% | 2 9% | 1 7% | (12 7%) |
| 2026-04-06 – 2026-04-09 | NC Report / La Razón | 26 9% | 32 8% | 18 3% | 5 8% | 3 8% | 1 9% | — | (10 5%) |
| 2026-03-23 – 2026-04-08 | Ipsos / La Vanguardia | 28 4% | 30 9% | 18 3% | 5 8% | 1 8% | 2 2% | 2 2% | (10 4%) |
| 2026-03-16 – 2026-03-31 | Sigma Dos / El Mundo | 27 7% | 32 5% | 17 1% | 7 7% | 3 5% | 1 8% | — | (9 7%) |
| 2026-03-24 – 2026-03-26 | Target Point / El Debate | 27 6% | 31 7% | 18 3% | 6 9% | 3 3% | — | 2 2% | (10 0%) |
:
| 1 325 | 1 347 | 11 447 | |
| 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 | 32 | 32 | 297 |