Spain / Next Spanish General Election
Sigma Dos
Voting intention · published 4 Oct 2026
- Country
- 🇪🇸 Spain
- Election
- Next Spanish General Election
- Polling institute
- Sigma Dos
- Published
- 4 Oct 2026
- Fieldwork
- 22 Sept 2026 – 1 Oct 2026
- Sample size
- 2,116
- Margin of error
- ±2.1 est. (Not published: estimated from sample size (95%, simple random sample))
- Methodology
- Not published
Results
Sigma Dos, 4 Oct 2026: Partido Popular leads with 32.6%, 7.0 points ahead of Partido Socialista Obrero Español.
- Partido Popular32.6%−0.5 percentage points
- Partido Socialista Obrero Español25.6%+0.2 percentage points
- Vox18.3%+0.4 percentage points
- Sumar6.6%±0.0 percentage points
- Podemos3.3%+0.5 percentage points
- Esquerra Republicana de Catalunya2.5%+0.1 percentage points
- Euskal Herria Bildu1.3%+0.1 percentage points
- Junts per Catalunya1.1%±0.0 percentage points
- Aliança Catalana1.0%±0.0 percentage points
- Partido Nacionalista Vasco1.0%±0.0 percentage points
- Bloque Nacionalista Galego0.9%+0.1 percentage points
- Adelante Andalucía0.8%±0.0 percentage points
- Canarian Coalition0.5%±0.0 percentage points
- Unión del Pueblo Navarro0.2%±0.0 percentage points
Change in percentage points vs. the previous poll by the same institute for this election.
Note: Commissioned by El Mundo.
How to read a poll
- Sample size is how many people were asked. More people means less random error, never none.
- ±3 is the margin of error: the real figure is likely within 3 points either way of the one shown.
- Two polls can differ because they were taken on different dates, with different methods and different samples.
- est. means the institute did not publish a margin of error, so it is estimated from the sample size.
- The average smooths this out: it combines recent polls, so one unusual poll cannot swing the picture.