CIS barometer
CIS poll of September 6, 2025
In the CIS poll (fieldwork September 1, 2025 to September 6, 2025, 4,122 interviews), the list with the most votes is PSOE, on 32.7 % of the vote. Next comes PP, on 23.7 %. Compared with this pollster's previous poll (July 7, 2025), PSOE moved by +5.7 points. In our average that day, PSOE stood at 26.6 %.
- Pollster
- CIS
- Commissioned by
- n/a
- Fieldwork
- 1-6 Sep
- Sample
- 4,122
CIS barometers and their re-estimates are not part of our average: they are shown separately.
Estimate by party
| Party | Vote | Vs. previous | Vs. average |
|---|---|---|---|
| PSOE | 32.7 % | +5.7 | +6.1 |
| PP | 23.7 % | −2.8 | −9.8 |
| Vox | 17.3 % | −1.6 | +0.7 |
| Sumar | 7.9 % | +0.1 | +1.6 |
| Podemos | 4.3 % | −0.1 | −0.5 |
| ERC | 2.1 % | 0.0 | +0.5 |
| SALF | 1.6 % | −0.1 | 0.0 |
| EH Bildu | 1.1 % | +0.2 | −0.3 |
| Junts | 0.8 % | −0.2 | −0.7 |
| BNG | 0.7 % | 0.0 | −0.1 |
| PNV | 0.6 % | −0.2 | −0.5 |
| CC | 0.1 % | −0.2 | −0.3 |
| UPN | 0.1 % | 0.0 | −0.1 |
Vs. previous: change in points from the same pollster's poll of July 7, 2025. Vs. average: difference from our weighted average of September 6, 2025.
Figures from the poll table on Wikipedia (CC BY-SA 4.0). Original publication: CIS.
How to cite: Su Momento, “CIS poll of September 6, 2025”, September 6, 2025, https://sumomento.com/en/encuestas/cis-2025-09-06