Opinion polling for the 2027 Spanish local elections (Basque Country)

In the run up to the 2027 Spanish local elections, various organisations carry out opinion polling to gauge voting intention in local entities in Spain. Results of such polls for municipalities and the three foral deputations (General Assemblies) in the Basque Country are displayed in this article. The date range for these opinion polls is from the previous local elections, held on 28 May 2023, to the day the next elections will be held, on 23 May 2027.

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.

Municipalities Amorebieta-Etxano Polling firm/Commissioner Fieldwork date Sample size Turnout Lead Gizaker/City Council 27–28 Oct 2025 400 67.0 42.7 40.3 9.4 5.2 2.4 2.4 2023 municipal election 28 May 2023 64.4 43.6 38.8 8.6 5.2 2.1 4.8

Barakaldo Polling firm/Commissioner Fieldwork date Sample size Turnout Lead Gizaker/City Council 18–22 Dec 2025 550 54.0 37.2 22.6 18.5 7.7 7.4 14.6 2023 municipal election 28 May 2023 56.0 36.0 24.5 15.9 8.7 7.2 11.5

Bilbao Polling firm/Commissioner Fieldwork date Sample size Turnout Lead Gizaker/City Council 26 Jun–2 Jul 2025 800 55.0 37.4 21.9 14.9 10.9 6.0 5.2 1.4 15.5 2023 municipal election 28 May 2023 56.2 36.6 18.9 16.4 12.1 8.0 3.4 – 17.7

Durango Polling firm/Commissioner Fieldwork date Sample size Turnout SQ–2D Lead Gizaker/City Council 9–12 Jun 2025 400 66.0 41.4 34.9 7.8 6.3 6.6 3.0 6.5 2023 municipal election 28 May 2023 64.1 37.8 35.4 8.2 6.6 6.1 4.5 2.4

Erandio Polling firm/Commissioner Fieldwork date Sample size Turnout Lead Gizaker/City Council 17–19 Jun 2025 600 58.5 32.9 30.5 19.3 8.4 6.1 2.4 2023 municipal election 28 May 2023 56.9 35.4 24.9 20.7 9.0 6.4 10.5

Getxo Polling firm/Commissioner Fieldwork date Sample size Turnout Lead Gizaker/City Council 19–27 Jun 2025 900 61.0 31.1 21.9 23.5 9.7 4.7 3.3 7.6 Ikerfel/City Council Sep 2023 700?????? –? 2023 municipal election 28 May 2023 62.3 31.7 21.7 20.2 10.3 5.6 3.4 10.0

Leioa Polling firm/Commissioner Fieldwork date Sample size Turnout Lead Gizaker/City Council 12–16 Jun 2025 600 64.0 40.0 25.2 12.6 13.3 7.3 1.6 14.8 2023 municipal election 28 May 2023 57.3 38.3 21.6 15.1 12.9 9.7 – 16.7

Santurtzi Polling firm/Commissioner Fieldwork date Sample size Turnout Lead Gizaker/City Council 22–26 Jan 2026 400 57.0 30.0 32.9 20.3 9.0 5.3 2.3 2.9 2023 municipal election 28 May 2023 57.9 32.2 26.9 23.0 8.3 5.7 2.1 5.3

Vitoria-Gasteiz Polling firm/Commissioner Fieldwork date Sample size Turnout Lead Ikerfel/City Council 1–19 Dec 2025 1,306 57.0 26.6 20.1 18.1 19.9 4.4 6.3 6.5 2023 municipal election 28 May 2023 58.1 22.8 21.9 20.1 19.7 7.1 3.8 0.9

General Assemblies Álava Polling firm/Commissioner Fieldwork date Sample size Turnout Lead Ikerfel/GPS 20–26 May 2026 800 59.2 28.5 28.2 15.8 15.0 1.7 5.9 2.2 0.3 Gizaker/Álava Deputation 15–20 May 2026 1,200 61.9 29.4 28.0 15.4 15.5 1.9 4.5 3.3 1.4 Gizaker/EiTB 17 Apr–13 May 2026 950? 28.6 27.9 16.4 14.9 2.6 4.6 2.9 0.7 Gizaker/Álava Deputation 12–18 Dec 2025 1,200 60.5 30.0 28.4 15.5 13.1 5.6 5.0 – 1.6 Gizaker/Álava Deputation 1–4 Apr 2025 1,100 59.7 27.9 25.8 18.4 15.1 5.5 4.3 – 2.1 2024 EP election 9 Jun 2024 48.4 15.2 21.4 28.8 17.6 3.6 3.9 3.8 7.4 2024 regional election 21 Apr 2024 59.4 26.7 29.1 16.2 15.9 2.4 3.7 3.7 2.4 2023 general election 23 Jul 2023 65.5 16.6 19.5 27.7 17.9 3.9 12.7 8.2 2023 foral election 28 May 2023 60.1 25.9 25.1 18.5 16.0 7.0 3.0 – 0.8

Biscay Polling firm/Commissioner Fieldwork date Sample size Turnout Lead Ikerfel/GPS 20–26 May 2026 1,485 59.3 39.4 29.0 14.9 6.8 1.7 3.1 1.9 10.4 Gizaker/EiTB 17 Apr–13 May 2026 1,500? 39.2 29.6 14.0 6.6 3.1 2.6 3.5 9.6 Ikerfel/Biscay Deputation 3–18 Dec 2025 3,002 60.5 41.6 29.3 14.3 6.6 2.0 2.7 2.2 12.3 Ikerfel/Biscay Deputation 11 Jun–7 Jul 2025 3,000 60.2 40.7 28.9 14.1 7.9 1.9 2.6 2.3 11.8 Ikerfel/Biscay Deputation 18 Jun–6 Jul 2024 3,063 60.9 41.0 28.3 13.8 8.2 3.4 1.9 2.0 12.7 2024 EP election 9 Jun 2024 49.5 25.5 22.7 26.5 11.7 3.2 2.7 3.3 1.0 2024 regional election 21 Apr 2024 60.8 39.1 28.3 13.9 9.0 2.2 1.9 3.3 10.8 2023 general election 23 Jul 2023 65.2 26.9 20.6 25.8 11.6 2.6 10.9 1.1 2023 foral election 28 May 2023 60.1 38.4 25.0 15.9 8.2 7.3 2.0 – 13.4

Gipuzkoa Polling firm/Commissioner Fieldwork date Sample size Turnout Lead Gizaker/Gipuzkoa Deputation 25 Jun–1 Jul 2026 1,500 60.2 39.9 32.9 14.1 5.2 5.0 – 1.2 7.0 Ikerfel/GPS 20–26 May 2026 1,200 59.5 39.6 33.4 13.1 2.0 6.1 1.3 1.5 6.2 Gizaker/EiTB 17 Apr–13 May 2026 1,200? 39.7 33.7 14.5 2.1 5.3 2.3 1.7 6.0 Gizaker/Gipuzkoa Deputation 3–10 Dec 2025 1,500 58.0 39.4 32.9 13.9 4.8 5.5 – – 6.5 Gizaker/Gipuzkoa Deputation 22–28 May 2025 1,500 59.7 40.0 31.9 15.1 4.8 6.0 – – 8.1 Gizaker/Gipuzkoa Deputation 5–12 Dec 2024 1,500 58.6 39.4 33.0 14.6 4.8 6.2 – – 6.4 2024 EP election 9 Jun 2024 47.9 34.4 20.6 24.0 3.0 8.7 3.0 2.1 10.4 2024 regional election 21 Apr 2024 59.0 39.8 31.4 13.4 2.2 6.4 3.1 1.5 8.4 2023 general election 23 Jul 2023 64.5 31.2 22.6 23.3 8.7 10.6 2.1 7.9 2023 foral election 28 May 2023 60.1 36.6 32.0 15.7 6.5 6.3 – – 4.6

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References