Opinion polling for the 2026 Senedd election

Common card · No. 475030

In the run-up to the 2026 Senedd election, various organisations conducted opinion polls to gauge voting intentions. Results of such polls are displayed in this list. The pollsters listed are members of the British Polling Council (BPC) and abided by its disclosure rules. The date range for these opinion polls is from the previous Senedd election, held on 6 May 2021, to the day of the election, held on 7 May 2026. It was the seventh devolved general election since the Senedd (formerly the National Assembly for Wales) was established in 1999. It was also be the first election following reforms to the voting system, which increased the size of the Senedd from 60 members to 96, adopted a party-list voting system, reduced the number of constituencies to sixteen, and shortened its term from five years to four. However the 23 October 2025 Caerphilly by-election where 33,689 votes were cast used first-past-the-post voting.

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