.
| PP | PSOE | Vox | Sumar | Podemos | ERC | SALF | |||
|---|---|---|---|---|---|---|---|---|---|
| 2026-09-16 – 2026-09-21 | DYM / Henneo | 34 7% | 26 3% | 17 3% | 4 5% | 3 7% | — | 1% | (12 5%) |
| 2026-09-07 – 2026-09-11 | Invymark / laSexta | 33 7% | 26 8% | 18 6% | 6 1% | 3 3% | — | 1 8% | (9 7%) |
| 2026-09-09 – 2026-09-10 | Target Point / El Debate | 31 5% | 25 6% | 18 9% | 6 9% | 2 8% | — | 2 5% | (11 8%) |
| 2026-09-01 – 2026-09-08 | Hamalgama Métrica / Vozpópuli | 33 6% | 25 1% | 19 3% | 5 6% | 3 8% | 1 9% | 1 6% | (9 1%) |
| 2026-09-01 – 2026-09-04 | CIS | 25 5% | 31% | 16 6% | 5 7% | 3 7% | 2 5% | 1 8% | (13 2%) |
| 2026-09-01 – 2026-09-03 | NC Report / La Razón | 34 5% | 24 9% | 18 3% | 5 7% | 3 4% | 2% | — | (11 2%) |
| 2026-09-01 – 2026-09-03 | GAD3 / ABC | 31 1% | 26 1% | 19 2% | 7% | 3 1% | 2 3% | 1 5% | (9 7%) |
| 2026-08-31 – 2026-09-02 | 40dB / Prisa | 32 4% | 27 6% | 17 8% | 5 7% | 2 8% | — | 2 2% | (11 5%) |
| 2026-08-24 – 2026-08-28 | More in Common | 28 7% | 27% | 20 3% | 6 6% | 3 6% | — | 2 3% | (11 5%) |
| 2026-08-26 – 2026-08-27 | Data10 / OKDiario | 34 3% | 25 4% | 18 1% | 6 3% | 3 6% | 2% | — | (10 3%) |
:
| 1 362 | 1 384 | 11 811 | |
| 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 | 69 | 69 | 661 |