In the run up to the next Spanish general election, various organisations carry out opinion polling to gauge voting intention in autonomous communities and constituencies in Spain during the term of the 15th Cortes Generales. Results of such polls are displayed in this article. The date range for these opinion polls is from the previous general election, held on 23 July 2023, to the present day.

Voting intention estimates refer mainly to a hypothetical Congress of Deputies election. Polls are listed in reverse chronological order, showing the most recent first and using the dates when the survey fieldwork was done, as opposed to the date of publication. Where the fieldwork dates are unknown, the date of publication is given instead. The highest percentage figure in each polling survey is displayed with its background shaded in the leading party's colour. If a tie ensues, this is applied to the figures with the highest percentages. The "Lead" columns on the right shows the percentage-point difference between the parties with the highest percentages in a given poll.

Refusals are generally excluded from the party vote percentages, while question wording and the treatment of "don't know" responses and those not intending to vote may vary between polling organisations. When available, seat projections are displayed below the percentages in a smaller font.

Autonomous communities Andalusia Polling firm/Commissioner Fieldwork date Sample size Turnout SALF Lead GAD3/Vocento 30 Apr–7 May 2026 1,142? 37.6 29.0 18.0? – – 8.6 GAD3/Vocento 13–16 Apr 2026 1,001? 38.9 29.7 16.8 7.5 – – 9.2 GAD3/Vocento 24–27 Mar 2026 1,002? 37.7 29.9 17.3 7.6 2.3 2.4 7.8 Sigma Dos/El Mundo 30 Oct–6 Nov 2025????????? Sigma Dos/El Mundo 17 Sep–1 Oct 2025????????? Sigma Dos/El Mundo 20–28 Aug 2025????????? Sigma Dos/El Mundo 21–30 Jul 2025????????? Sigma Dos/El Mundo 20–27 Jun 2025????????? Sigma Dos/El Mundo 21 Apr–28 May 2025????????? GAD3/ABC 3–10 Jun 2025 804? 37.4 28.2 16.9 10.8 2.0 – 9.2 Sigma Dos/El Mundo 4–15 Apr 2025????????? Sigma Dos/El Mundo 24 Feb–7 Mar 2025????????? Sigma Dos/El Mundo 24–31 Jan 2025????????? Sigma Dos/El Mundo 13–26 Dec 2024????????? Sigma Dos/El Mundo 20–27 Sep 2024????????? 2024 EP election 9 Jun 2024 43.6 37.9 32.2 10.9 5.1 2.8 6.2 5.7 2023 general election 23 Jul 2023 66.6 36.4 33.5 15.3 12.0 – 2.9

Aragon Polling firm/Commissioner Fieldwork date Sample size Turnout Existe SALF Lead 2026 regional election 8 Feb 2026 65.1 34.2 24.4 17.8 3.0 3.5 9.7 1.0 2.7 9.8 Sigma Dos/El Mundo 30 Oct–6 Nov 2025??????? ??? Sigma Dos/El Mundo 17 Sep–1 Oct 2025??????? ??? Sigma Dos/El Mundo 20–28 Aug 2025??????? ??? Sigma Dos/El Mundo 21–30 Jul 2025??????? ??? Sigma Dos/El Mundo 20–27 Jun 2025??????? ??? Sigma Dos/El Mundo 21 Apr–28 May 2025??????? ??? Sigma Dos/El Mundo 4–15 Apr 2025??????? ??? Sigma Dos/El Mundo 24 Feb–7 Mar 2025??????? ??? Sigma Dos/El Mundo 24–31 Jan 2025??????? ??? Sigma Dos/El Mundo 13–26 Dec 2024??????? ??? Sigma Dos/El Mundo 20–27 Sep 2024??????? ??? 2024 EP election 9 Jun 2024 51.1 37.1 30.3 11.5 5.1 2.9 3.1 5.1 6.8 2023 general election 23 Jul 2023 70.7 36.3 31.1 14.6 12.3 2.9 – 5.2

Asturias Polling firm/Commissioner Fieldwork date Sample size Turnout SALF Lead Sigma Dos/El Mundo 30 Oct–6 Nov 2025???????? Tie Sigma Dos/El Mundo 17 Sep–1 Oct 2025???????? Tie Sigma Dos/El Mundo 20–28 Aug 2025???????? Tie Sigma Dos/El Mundo 21–30 Jul 2025???????? Tie Sigma Dos/El Mundo 20–27 Jun 2025???????? Tie Sigma Dos/El Mundo 21 Apr–28 May 2025???????? Tie Sigma Dos/El Mundo 4–15 Apr 2025???????? Tie Sigma Dos/El Mundo 24 Feb–7 Mar 2025???????? Tie Sigma Dos/El Mundo 24–31 Jan 2025???????? Tie Sigma Dos/El Mundo 13–26 Dec 2024???????? Tie Sigma Dos/El Mundo 20–27 Sep 2024???????? Tie 2024 EP election 9 Jun 2024 44.7 36.9 35.1 5.9 10.0 3.8 3.3 1.8 2023 general election 23 Jul 2023 62.9 35.6 34.3 14.8 12.5 – 1.3

Balearic Islands Polling firm/Commissioner Fieldwork date Sample size Turnout AraMés SALF Lead Sigma Dos/El Mundo 30 Oct–6 Nov 2025??????? ?? Sigma Dos/El Mundo 17 Sep–1 Oct 2025??????? ?? Sigma Dos/El Mundo 20–28 Aug 2025??????? ?? Sigma Dos/El Mundo 21–30 Jul 2025??????? ?? Sigma Dos/El Mundo 20–27 Jun 2025??????? ?? Sigma Dos/El Mundo 21 Apr–28 May 2025??????? ?? Sigma Dos/El Mundo 4–15 Apr 2025??????? ?? Sigma Dos/El Mundo 24 Feb–7 Mar 2025??????? ?? Sigma Dos/El Mundo 24–31 Jan 2025??????? ?? Sigma Dos/El Mundo 13–26 Dec 2024??????? ?? Sigma Dos/El Mundo 20–27 Sep 2024??????? ?? 2024 EP election 9 Jun 2024 37.7 35.8 28.9 4.4 11.2 3.1 5.2 5.3 6.9 2023 general election 23 Jul 2023 61.3 35.6 30.2 16.6 15.2 – 5.4

Basque Country Polling firm/Commissioner Fieldwork date Sample size Turnout Lead Sigma Dos/El Mundo 30 Oct–6 Nov 2025????????? Sigma Dos/El Mundo 17 Sep–1 Oct 2025????????? Gizaker/EiTB 15–23 Sep 2025 1,200? 22.3 24.327.1 10.1 8.2 4.9 2.8 Sigma Dos/El Mundo 20–28 Aug 2025????????? Sigma Dos/El Mundo 21–30 Jul 2025????????? Sigma Dos/El Mundo 20–27 Jun 2025????????? Sigma Dos/El Mundo 21 Apr–28 May 2025????????? Sigma Dos/El Mundo 4–15 Apr 2025????????? Sigma Dos/El Mundo 24 Feb–7 Mar 2025???????? Tie Sigma Dos/El Mundo 24–31 Jan 2025???????? Tie Sigma Dos/El Mundo 13–26 Dec 2024????????? Sigma Dos/El Mundo 20–27 Sep 2024????????? 2024 EP election 9 Jun 2024 48.8 26.0 22.4 26.3 11.6 3.3 2.7 0.3 2024 regional election 21 Apr 2024 60.0 14.1 34.8 32.1 9.2 3.3 2.0 2.7 Sigma Dos/El Mundo 13–15 Sep 2023 800?25.1 23.1 24.2 12.3 11.2 2.9 0.9 2023 general election 23 Jul 2023 65.125.3 24.0 23.9 11.6 11.1 2.6 1.3

Canary Islands Polling firm/Commissioner Fieldwork date Sample size Turnout SALF Lead EM-Analytics/Electomanía 4 Feb 2026?? 30.0 24.0 11.0 5.0 21.0 4.0 3.0 – 6.0 Sigma Dos/El Mundo 30 Oct–6 Nov 2025??????? –?? Tie Sigma Dos/El Mundo 17 Sep–1 Oct 2025??????? –?? Tie Sigma Dos/El Mundo 20–28 Aug 2025??????? –?? Tie Sigma Dos/El Mundo 21–30 Jul 2025??????? –??? Sigma Dos/El Mundo 20–27 Jun 2025??????? –?? Tie Sigma Dos/El Mundo 21 Apr–28 May 2025??????? –?? Tie Sigma Dos/El Mundo 4–15 Apr 2025??????? –?? Tie Sigma Dos/El Mundo 24 Feb–7 Mar 2025??????? –?? Tie Sigma Dos/El Mundo 24–31 Jan 2025??????? –?? Tie Sigma Dos/El Mundo 13–26 Dec 2024??????? –?? Tie Sigma Dos/El Mundo 20–27 Sep 2024??????? –?? Tie 2024 EP election 9 Jun 2024 37.2 30.5 29.3 10.3 4.0 12.0 – 3.4 6.3 1.2 2023 general election 23 Jul 2023 58.2 33.3 30.4 11.4 10.5 7.6 4.5 – 2.9

Cantabria Polling firm/Commissioner Fieldwork date Sample size Turnout SALF Lead Sigma Dos/El Mundo 30 Oct–6 Nov 2025???????? Tie Sigma Dos/El Mundo 17 Sep–1 Oct 2025????????? Sigma Dos/El Mundo 20–28 Aug 2025????????? Sigma Dos/El Mundo 21–30 Jul 2025????????? Sigma Dos/El Mundo 20–27 Jun 2025????????? Sigma Dos/El Mundo 21 Apr–28 May 2025???????? Tie Sigma Dos/El Mundo 4–15 Apr 2025????????? Sigma Dos/El Mundo 24 Feb–7 Mar 2025???????? Tie Sigma Dos/El Mundo 24–31 Jan 2025???????? Tie Sigma Dos/El Mundo 13–26 Dec 2024????????? Sigma Dos/El Mundo 20–27 Sep 2024????????? 2024 EP election 9 Jun 2024 50.7 42.8 31.0 9.9 3.2 2.7 5.7 11.8 2023 general election 23 Jul 2023 69.9 42.1 33.3 14.1 8.5 – 8.8

Castile and León Polling firm/Commissioner Fieldwork date Sample size Turnout SALF Lead 2026 regional election 15 Mar 2026 60.6 35.4 30.8 18.9 2.3 4.3 0.8 1.4 4.6 Sigma Dos/El Mundo 30 Oct–6 Nov 2025?????? –??? Sigma Dos/El Mundo 17 Sep–1 Oct 2025?????? –??? Sigma Dos/El Mundo 20–28 Aug 2025?????? –??? Sigma Dos/El Mundo 21–30 Jul 2025?????? –??? Sigma Dos/El Mundo 20–27 Jun 2025?????? –??? Sigma Dos/El Mundo 21 Apr–28 May 2025?????? –??? Sigma Dos/El Mundo 4–15 Apr 2025?????? –??? Sigma Dos/El Mundo 24 Feb–7 Mar 2025?????? –??? Sigma Dos/El Mundo 24–31 Jan 2025?????? –??? Sigma Dos/El Mundo 13–26 Dec 2024?????? –??? Sigma Dos/El Mundo 20–27 Sep 2024?????? –??? 2024 EP election 9 Jun 2024 51.5 44.5 30.5 10.5 2.9 – 2.4 4.0 14.0 2023 general election 23 Jul 2023 69.4 41.5 32.3 13.8 7.0 1.6 – 9.2

Castilla–La Mancha Polling firm/Commissioner Fieldwork date Sample size Turnout SALF Lead Sigma Dos/El Mundo 30 Oct–6 Nov 2025????????? Sigma Dos/El Mundo 17 Sep–1 Oct 2025????????? Sigma Dos/El Mundo 20–28 Aug 2025????????? Sigma Dos/El Mundo 21–30 Jul 2025????????? Sigma Dos/El Mundo 20–27 Jun 2025????????? Sigma Dos/El Mundo 21 Apr–28 May 2025????????? Sigma Dos/El Mundo 4–15 Apr 2025????????? Sigma Dos/El Mundo 24 Feb–7 Mar 2025????????? Sigma Dos/El Mundo 24–31 Jan 2025????????? Sigma Dos/El Mundo 13–26 Dec 2024????????? Sigma Dos/El Mundo 20–27 Sep 2024????????? 2024 EP election 9 Jun 2024 50.3 41.5 31.7 13.0 3.0 2.2 5.0 9.8 2023 general election 23 Jul 2023 73.0 38.9 34.2 17.8 7.4 – 4.7

Catalonia Polling firm/Commissioner Fieldwork date Sample size Turnout Lead GESOP/CEO 21 May–25 Jun 2026 2,000? 29.0 8.0 11.0 17.7 10.8 12.8 3.3 3.5 – 11.3 Opinòmetre/CEO 13 Oct–11 Nov 2025 2,000? 31.3 7.8 11.1 17.7 10.6 11.4 2.6 3.6 – 13.6 Sigma Dos/El Mundo 30 Oct–6 Nov 2025???????????? Sigma Dos/El Mundo 17 Sep–1 Oct 2025???????????? Sigma Dos/El Mundo 20–28 Aug 2025?????????? –? Sigma Dos/El Mundo 21–30 Jul 2025?????????? –? Opinòmetre/CEO 30 May–28 Jun 2025 2,000? 31.9 8.7 12.2 14.5 11.0 10.4 3.1 3.5 – 17.4 Sigma Dos/El Mundo 20–27 Jun 2025?????????? –? Sigma Dos/El Mundo 21 Apr–28 May 2025?????????? –? Sigma Dos/El Mundo 4–15 Apr 2025?????????? –? Opinòmetre/CEO 14 Feb–14 Mar 2025 2,000? 33.0 7.8 12.6 13.6 11.3 8.5 3.9 4.8 – 19.4 Sigma Dos/El Mundo 24 Feb–7 Mar 2025?????????? –? Sigma Dos/El Mundo 24–31 Jan 2025?????????? –? Sigma Dos/El Mundo 13–26 Dec 2024?????????? –? GESOP/CEO 11 Oct–24 Nov 2024 2,000? 33.0–37.0 11.0–14.0 12.0–15.0 10.0–13.0 10.0–13.0 7.0–9.0 3.0–5.0 – 21.0–22.0 Sigma Dos/El Mundo 20–27 Sep 2024?????????? –? 2024 EP election 9 Jun 2024 43.5 30.6 4.3 13.8 14.8 18.0 6.2 – 4.6 – 12.6 2024 regional election 12 May 2024 55.3 28.0 5.8 11.0 13.7 21.6 8.0 4.1 – 3.8 6.4 GESOP/CEO 9 Feb–7 Mar 2024 2,000? 31.0–35.0 10.0–13.0 13.0–16.0 13.0–16.0 10.0–13.0 6.0–8.0 3.0–4.0 – 18.0–19.0 GESOP/CEO 9 Oct–7 Nov 2023 2,000? 29.0–33.0 10.0–13.0 17.0–21.0 14.0–17.0 10.0–12.0 5.0–7.0 2.0–3.0 – 12.0 Sigma Dos/El Mundo 7–9 Sep 2023 1,000? 33.6 14.5 14.4 12.4 12.5 7.0 – – 19.1 2023 general election 23 Jul 2023 62.7 34.5 14.0 13.3 13.2 11.2 7.8 2.8 – 20.5

Extremadura Polling firm/Commissioner Fieldwork date Sample size Turnout SALF Lead 2025 regional election 21 Dec 2025 60.8 25.8 43.1 16.9 10.3 –? Sigma Dos/El Mundo 30 Oct–6 Nov 2025????????? Sigma Dos/El Mundo 17 Sep–1 Oct 2025????????? Sigma Dos/El Mundo 20–28 Aug 2025???????? Tie Sigma Dos/El Mundo 21–30 Jul 2025???????? Tie Sigma Dos/El Mundo 20–27 Jun 2025???????? Tie Sigma Dos/El Mundo 21 Apr–28 May 2025???????? Tie Sigma Dos/El Mundo 4–15 Apr 2025???????? Tie Sigma Dos/El Mundo 24 Feb–7 Mar 2025???????? Tie Sigma Dos/El Mundo 24–31 Jan 2025???????? Tie Sigma Dos/El Mundo 13–26 Dec 2024???????? Tie Sigma Dos/El Mundo 20–27 Sep 2024????????? 2024 EP election 9 Jun 2024 46.9 36.6 41.4 10.0 2.5 2.2 3.4 4.8 2023 general election 23 Jul 2023 71.7 39.1 37.9 13.6 6.9 – 1.2

Galicia