.
| PP | PSOE | Vox | Sumar | Podemos | ERC | SALF | |||
|---|---|---|---|---|---|---|---|---|---|
| 2026-07-02 – 2026-07-04 | SocioMétrica / El Español | 33 6% | 25 7% | 16 9% | 6 0% | 2 8% | 2 3% | 2 2% | (10 5%) |
| 2026-06-25 – 2026-07-01 | NC Report / La Razón | 34 5% | 25 0% | 17 8% | 6 1% | 3 6% | 2 0% | — | (11 0%) |
| 2026-06-26 – 2026-06-29 | 40dB / Prisa | 32 0% | 28 0% | 17 2% | 5 8% | 3 1% | — | 2 1% | (11 8%) |
| 2026-06-16 – 2026-06-29 | Ipsos / La Vanguardia | 31 2% | 27 1% | 18 5% | 7 6% | 1 8% | 2 0% | 1 9% | (9 9%) |
| 2026-06-24 – 2026-06-28 | More in Common | 31 3% | 25 7% | 17 1% | 8 2% | 3 3% | — | 2 2% | (12 2%) |
| 2026-06-22 – 2026-06-26 | Invymark / laSexta | 33 5% | 27 3% | 17 5% | 5 7% | 3 5% | — | 1 7% | (10 8%) |
| 2026-06-17 – 2026-06-18 | Target Point / El Debate | 32 0% | 25 6% | 18 1% | 7 2% | 3 2% | — | 2 2% | (11 7%) |
| 2026-06-01 – 2026-06-11 | Sigma Dos / El Mundo | 32 6% | 26 4% | 17 2% | 7% | 3 4% | 2% | — | (11 4%) |
| 2026-06-01 – 2026-06-04 | CIS | 27 1% | 31 5% | 15 8% | 6 4% | 2 8% | 1 9% | 1 9% | (12 6%) |
| 2026-05-28 – 2026-06-01 | 40dB / Prisa | 32 4% | 27 7% | 17 4% | 6 2% | 2 3% | — | 2 1% | (11 9%) |
:
| 1 342 | 1 364 | 11 613 | |
| 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 | 49 | 49 | 463 |