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In the run up to the next Portuguese legislative election, various organisations will carry out opinion polling to gauge voting intention in Portugal. Results of such polls are displayed in this article. The date range for these opinion polls are from the 2024 Portuguese legislative election, held on 10 March, to the present day.
Poll results are listed in the table below in reverse chronological order, showing the most recent first. The highest percentage figure in each polling survey is displayed in bold, and the background shaded in the leading party's colour. In the instance that there is a tie, parties are shaded with their colour. The lead column on the right shows the percentage-point difference between the two parties with the highest figures. Poll results use the date the survey's fieldwork was done, as opposed to the date of publication.
Polls that show their results without distributing those respondents who are undecided or said they would abstain from voting, are re-calculated by removing these numbers from the totals through a simple rule of three, in order to obtain results comparable to other polls and the official election results.
| Polling firm/Link | Fieldwork date | Sample size | Turnout |  |  |  |  |  |  |  | O | Lead | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| CESOP–UCP | 7–13 Jul 2024 | 957 | ? | 31 | 33 | 14 | 7 | 4 | 3 | 3 | 2 | 3 | 2 |
| Aximage | 3–8 Jul 2024 | 801 | ? | 27.6 | 29.5 | 17.5 | 7.1 | 4.6 | 3.5 | 4.1 | 2.5 | 3.6 | 1.9 |
| 2024 EP elections [1] | 9 Jun 2024 | — | 36.6 | 31.1 (89) | 32.1 (87) | 9.8 (19) | 9.1 (20) | 4.3 (5) | 4.1 (5) | 3.8 (5) | 1.2 (0) | 4.5 (0) | 1.0 |
| Intercampus [lower-alpha 1] | 29 May–4 Jun 2024 | 604 | ? | 29.5 | 27.1 | 16.1 | 9.3 | 7.1 | 1.6 | 5.5 | 3.1 | 0.7 | 2.4 |
| Intercampus [lower-alpha 2] | 12–20 May 2024 | 609 | ? | 23.7 | 24.7 | 17.4 | 9.0 | 8.2 | 2.5 | 9.4 | 3.2 | 1.9 | 1.0 |
| CESOP–UCP | 13–18 May 2024 | 965 | ? | 30 | 29 | 19 | 5 | 4 | 3 | 5 | 2 | 3 | 1 |
| Intercampus [lower-alpha 3] | 18–23 Apr 2024 | 605 | ? | 24.3 | 28.7 | 15.6 | 7.9 | 9.7 | 2.3 | 5.7 | 2.9 | 2.9 | 4.4 |
| 2024 legislative election [2] | 10 Mar 2024 | — | 59.9 | 28.8 80 | 28.0 78 | 18.1 50 | 4.9 8 | 4.4 5 | 3.2 4 | 3.2 4 | 2.0 1 | 7.5 0 | 0.8 |
Poll results showing public opinion on who would make the best prime minister or who is better positioned to win are shown in the table below in reverse chronological order, showing the most recent first.
| Polling firm/Link | Fieldwork date |  |  | N | Both/ O | NO | Lead |
|---|---|---|---|---|---|---|---|
| Aximage | 3–8 Jul 2024 | 37 | 28 | 16 | 11 | 8 | 9 |
| Aximage | 17–22 May 2024 | 40 | 28 | 18 | 9 | 5 | 12 |
Poll results showing the public opinion on all political party leaders rated from 0 to 10 [lower-alpha 4] (with the former being strong disapproval and the latter strong approval) are shown in the table below in reverse chronological order (showing the most recent first).
| Polling firm/Link | Fieldwork date | | |  |  |  |  |  |  |  | Lead |
|---|---|---|---|---|---|---|---|---|---|---|---|
| CESOP–UCP | 7–13 Jul 2024 | 5.7 | 4.8 | 3.3 | 4.5 | 4.2 | 3.5 | 4.4 | — | 3.7 | 0.9 |
| Intercampus | 29 May–4 Jun 2024 | 6.2 | 5.6 | 4.6 | 6.0 | 5.4 | 4.8 | 6.0 | 5.2 | 5.6 | 0.2 |
| Intercampus | 12–20 May 2024 | 6.0 | 5.8 | 4.8 | 6.0 | 5.6 | 4.8 | 6.4 | 5.0 | 5.6 | 0.4 |
| CESOP–UCP | 13–18 May 2024 | 5.7 | 4.9 | 3.5 | 4.6 | 4.4 | 4.0 | 4.9 | — | 4.0 | 0.8 |
| Intercampus | 18–23 Apr 2024 | 5.8 | 5.6 | 4.4 | 5.8 | 5.4 | 4.8 | 6.0 | 5.0 | 5.6 | 0.2 |
Poll results showing public opinion on the performance of the Government are shown in the table below in reverse chronological order, showing the most recent first.
| Polling firm/Link | Fieldwork date | Sample size | Luís Montenegro's cabinet | ||||
|---|---|---|---|---|---|---|---|
| Approve | Disapprove | Neither | No opinion | Net | |||
| CESOP–UCP | 3–7 Jul 2024 | 957 | 18 | 20 | 57 | 5 | 37 |
| Marktest | 5–7 Jun 2024 | 440 | 46.0 | 29.6 | 22.3 | 2.2 | 16.4 |
| Intercampus | 29 May–4 Jun 2024 | 604 | 31.5 | 31.6 | 35.3 | 1.7 | 3.7 |
| Intercampus | 12–20 May 2024 | 609 | 19.8 | 32.2 | 44.8 | 3.2 | 12.6 |
| CESOP–UCP | 13–18 May 2024 | 965 | 15 | 24 | 51 | 10 | 27 |
| Marktest | 7–15 May 2024 | 497 | 37.0 | 36.2 | 24.3 | 2.4 | 0.8 |
| Intercampus | 18–23 Apr 2024 | 605 | 21.8 | 37.8 | 35.9 | 4.5 | 1.9 |
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