The date range for these opinion polls is from the previous general election, held on 10 November 2019, to the present day.
Voting intention estimates refer mainly to a hypothetical Congress of Deputies election.
The highest percentage figure in each polling survey is displayed with its background shaded in the leading party's colour.
The "Lead" columns on the right shows the percentage-point difference between the parties with the highest percentages in a 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.