| Date(s) conducted |
Polling organisation/client | Sample size | Yes | No | No Answer/Don't Know | Lead | Notes |
|---|---|---|---|---|---|---|---|
| 23 September - 9 October 2020 | Centre d'Estudis d'Opinió | 1,500 | 45.5% | 46.3% | 8.2% | 0.8% | [CEO] |
| 7 September 2020 | GAD3/La Vanguardia | 800 | 45.2% | 46.7% | 8.1% | 1.5% | |
| 9 February - 3 March 2020 | Centre d'Estudis d'Opinió | 1,500 | 44.9% | 47.1% | 8.1% | 2.2% | |
| 3–6 February 2020 | GAD3/La Vanguardia | 800 | 44% | 49% | 7% | 5% | |
| 25 September - 23 October 2019 | Institut de Ciències Politiques i Socials | 1,200 | 46.0% | 31.5% | 22.5% | 4.6% | [ICPS 1][ICPS 2] |
| 16 September - 7 October 2019 | Centre d'Estudis d'Opinió | 1,500 | 40.3% | 49.3% | 10.4% | 8.4% | |
| 4-25 March 2019 | Centre d'Estudis d'Opinió | 2,000 | 48.4% | 44.1% | 7.5% | 4.3% | |
| 8 October - 5 November 2018 | Institut de Ciències Politiques i Socials | 1,200 | 47.9% | 31.8% | 20.2% | 16.1% |
- ^ Question: 'Do you want Catalunya to be an independent state?' Responses: Yes, No, Don't know, No answer
- ^ Question: 'If tomorrow a referendum were held to decide the independence of Catalunya, what would you do?' Responses: 'I would vote in favour', 'I would vote against', 'I wouldn't vote', 'Blank or empty vote' or 'Don't know/No Response'
- ^ ICPS also asks 'Do you want Catalunya to be an independent state or do you prefer to stay part of Spain' where 'stay part of Spain' regularly performs ~10 points better than 'No' to the referendum question