In the run up to the 2011 Portuguese presidential election, various organisations carried out opinion polling to gauge voting intention in Portugal. Results of such polls are displayed in this article.
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 candidate colour. In the instance that there is a tie, then no figure is shaded but both are displayed in bold. Poll results use the date the survey's fieldwork was done, as opposed to the date of publication.
| Date released | Poll source | width=60px | width=60px | width=60px | width=60px | width=60px | width=60px | Others/ Undecided | Lead | ||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| bgcolor=#FF9900 | bgcolor=#FF66FF | bgcolor=#777777 | bgcolor=#777777 | bgcolor=red | bgcolor=#1F468B | ||||||||||
| Silva PSD, CDS-PP – Inc. | Alegre PS, BE | Nobre Ind. | Moura Ind. | Lopes PCP | Coelho PND | ||||||||||
| 23 January 2011 | Election results | 53.0 | 19.7 | 14.1 | 1.6 | 7.1 | 4.5 | 33.3 | |||||||
| 23 January 2011 | Universidade Católica | 52.0–58.0 | 18.0–21.0 | 13.5– 16.5 | 1.0–2.0 | 5.0–8.0 | 2.0–4.0 | 35.5 | |||||||
| 23 January 2011 | Eurosondagem | 51.6–56.0 | 17.1–20.9 | 13.1–16.3 | 1.1–2.1 | 6.3–7.5 | 3.3–4.5 | 34.8 | |||||||
| 23 January 2011 | INTERCAMPUS | 51.4–55.4 | 17.2–21.2 | 12.4– 16.4 | 0.7–2.7 | 5.8–8.8 | 3.1–5.1 | 34.2 | |||||||
| 21 January 2011 | Sol (average) | 58.0 | 22.0 | 11.0 | 2.0 | 5.0 | 2.0 | 36.0 | |||||||
| 21 January 2011 | Universidade Católica | 59.0 | 22.0 | 10.0 | 1.0 | 6.0 | 2.0 | 37.0 | |||||||
| 21 January 2011 | Eurosondagem | 56.3 | 25.0 | 10.1 | 2.0 | 5.2 | 1.4 | 31.3 | |||||||
| 21 January 2011 | Aximage | 54.7 | 25.6 | 10.7 | 1.8 | 6.3 | 0.9 | 29.1 | |||||||
| 20 January 2011 | INTERCAMPUS | 54.6 | 22.8 | 9.1 | 2.6 | 8.2 | 2.7 | 31.8 | |||||||
| 19 January 2011 | Marktest | 61.5 | 15.0 | 12.7 | 1.2 | 3.3 | 2.1 | 4.2 | 46.5 | ||||||
| 8 January 2011 | Aximage | 57.1 | 20.8 | 8.7 | 3.1 | 2.0 | 0.5 | 7.8 | 36.3 | ||||||
| 7 January 2011 | INTERCAMPUS | 60.1 | 25.3 | 4.2 | 2.5 | 6.3 | 1.6 | 34.8 | |||||||
| 23 December 2010 | Eurosondagem | 60.0 | 30.0 | 4.8 | 0.7 | 4.5 | 30.0 | ||||||||
| 19 December 2010 | INTERCAMPUS | 64.3 | 20.7 | 5.5 | 1.0 | 4.5 | 43.6 | ||||||||
| 27 November 2010 | Eurosondagem | 57.0 | 32.0 | 5.2 | 1.0 | 4.8 | 25.0 | ||||||||
| 26 November 2010 | Marktest | 78.3 | 15.0 | 4.0 | 0.0 | 0.7 | 63.3 | ||||||||
| 21 November 2010 | INTERCAMPUS | 61.5 | 26.1 | 4.5 | 0.5 | 3.7 | 3.7 | 35.4 | |||||||
| 29 October 2010 | Marktest | 71.3 | 20.2 | 5.0 | 0.9 | 1.1 | 51.1 | ||||||||
| 29 October 2010 | Universidade Católica | 63.0 | 20.0 | 7.0 | 1.0 | 3.0 | 43.0 | ||||||||
| 13 October 2010 | Aximage | 55.1 | 35.7 | 7.1 | 0.2 | 1.9 | 19.4 | ||||||||
| 9 October 2010 | INTERCAMPUS | 55.5 | 30.7 | 4.9 | 1.2 | 5.6 | 24.8 | ||||||||
| 25 September 2010 | Marktest | 71.0 | 22.0 | 4.0 | 0.2 | 1.0 | 49.0 | ||||||||
| 24 September 2010 | Eurosondagem | 54.9 | 33.0 | 6.2 | 1.1 | 4.8 | 21.9 | ||||||||
| 12 September 2010 | Aximage | 58.1 | 32.1 | 5.4 | 0.0 | 4.4 | 26.0 | ||||||||
| 31 July 2010 | Marktest | 67.1 | 19.6 | 10.0 | 0.7 | 47.5 | |||||||||
| 24 July 2010 | INTERCAMPUS | 59.4 | 26.8 | 9.1 | 2.9 | 32.6 | |||||||||
| 12 July 2010 | Euroexpansão | 51.1 | 14.7 | 4.1 | 22.1 | 36.4 | |||||||||
| 11 July 2010 | Aximage | 55.3 | 26.9 | 11.6 | 6.2 | 28.4 | |||||||||
| 28 June 2010 | Universidade Católica | 50.0 | 19.0 | 7.0 | 25.0 | 31.0 | |||||||||
| 13 June 2010 | Aximage | 53.4 | 28.1 | 8.6 | 9.9 | 25.3 | |||||||||
| 14 March 2010 | Universidade Católica | 57.0 | 19.0 | 8.0 | 16.0 | 38.0 | |||||||||
| 13 March 2010 | Aximage | 56.0 | 21.6 | 13.8 | 8.6 | 34.4 | |||||||||
| 12 March 2010 | Eurosondagem | 36.9 | 25.0 | 9.6 | (5.0) | 23.5 | 11.9 | ||||||||
| 22 January 2010 | Aximage | 60.3 | 39.7 | 20.6 | |||||||||||