Opinion polling for the 2021 Senedd election

In the run-up to the 2021 Senedd election, various organisations carried out opinion polling to gauge voting intentions. Results of such polls are displayed in this list. Most of the pollsters listed are members of the British Polling Council (BPC) and abide by its disclosure rules.

The date range for these opinion polls was from the 2016 National Assembly for Wales election, held on 5 May 2016, to 6 May 2021 when the election for the newly named Senedd took place and was the first Welsh election which included 16 and 17-year-olds in the electoral franchise. After January 2020 most opinion polls also included this data set to reflect the enfranchisement in the next election.^[1]