The PSC would win the elections to the Parliament of Catalonia again, but would lose a good part of the advantage gained in 2024 and would have many more difficulties in forming a government. This is reflected in the latest Political Survey of Catalonia prepared by GESOP for El Periódico, which places the socialists with between 34 and 37 seats, compared to the current 42.
The main novelty of the survey is not, however, the victory of the PSC, but the spectacular growth of Aliança Catalana. The party led by Sílvia Orriols would go from two deputies to a range of between 25 and 28 seats, becoming the second political force in the Parliament and the main party of the independentist space.
The survey, conducted between July 16 and 22 on a sample of 800 interviews, outlines a much more fragmented scenario than the current one and without a clear majority to govern.
Aliança Catalana features the largest growth in the survey
The main conclusion of the survey is the strong advance of Aliança Catalana. The formation of Sílvia Orriols would obtain 16.8% of the votes and between 25 and 28 deputies, well above the two seats achieved in the 2024 regional elections.
The evolution would be as follows:
• Aliança Catalana: 2 → 25-28 seats.
• From 3.8% to 16.8% of the votes.
• It would become the second political force.
• It would become the first party of the independentist bloc.
According to the data from the study, Aliança Catalana captures support from practically the entire political spectrum.
Among the main transfers stand out:
• 24.5% of former voters of Junts.
• 13% of Vox.
• 9.2% from the PSC.
• 7.9% from ERC.
• 7.7% from the PP.
The survey also attributes to it the highest voter loyalty of all the formations, with 94% of its voters willing to repeat their support.
The PSC maintains victory but loses strength
The PSC would continue to be the most voted force, although it would decline compared to the 2024 regional elections. The socialists would go from 42 deputies to a range between 34 and 37 seats.
The comparison with the last elections would be as follows:
• PSC: 42 → 34-37 seats.
• From 27.7% to 25% of the votes.
Despite this decline, Salvador Illa's party would retain the first position.
However, the parliamentary majority that allowed for its investiture would be much tighter. The sum of PSC, ERC, and Comuns would range between 61 and 68 deputies, so it would only reach an absolute majority in the most favorable scenario of the range.
ERC grows while Junts suffers the biggest setback
The survey also outlines a profound reorganization of the independence space. ERC would slightly improve its results compared to 2024. The party led by Oriol Junqueras would obtain between 24 and 27 deputies, compared to the current 20.
On the contrary, Junts would suffer the most significant drop in the entire survey. Carles Puigdemont's party would go from 35 deputies to a range of between 15 and 18.
The evolution would be:
• ERC: 20 → 24-27 seats.
• Junts: 35 → 15-18 seats.
The loss of support for Junts coincides with the strong growth of Aliança Catalana, the main destination for a significant portion of its former voters.
What changes compared to the previous GESOP survey
The comparison with the previous GESOP barometer confirms the consolidation of Aliança Catalana's rise and the deterioration of Junts.
The evolution of the main parties would be:
• PSC: decreases compared to the previous survey and remains the leading force.
• Aliança Catalana: continues to grow and consolidates as the second force.
• ERC: slightly improves.
• Junts: deepens its setback.
• Vox: gains representation.
• PP: loses part of the support obtained in 2024.
The study shows a Parliament much more fragmented than the current one, where none of the traditional alliances would have guaranteed an absolute majority.
The only sum with a broad majority would be formed by PSC, ERC, and Junts, although the survey itself considers it politically very unlikely in the current context.
Source: GESOP for El Periódico (27/07/2026)
| Party | Estimated vote | Estimated seats |
|---|---|---|
| PSC | 25% | 34-37 |
| AC | 16.8% | 25-28 |
| ERC | 16% | 24-27 |
| Junts | 11.5% | 15-18 |
| Vox | 9.2% | 11-13 |
| PP | 8.6% | 12-13 |
| COM | 3.4% | 3-4 |
| CUP | 3.2% | 0-4 |