.
| SVP/UDC | SP/PS | DM/LC | FDP/PLR | GRÜNE/VERTS | GLP/PVL | EVP/PEV | |||
|---|---|---|---|---|---|---|---|---|---|
| 2025-10-31 – 2025-11-17 | YouGov | 28% | 18% | 15% | 14% | 8% | 8% | — | (9%) |
| 2025-10-06 – 2025-10-20 | YouGov | 29% | 17% | 15% | 14% | 9% | 9% | — | (7%) |
| 2025-09-16 – 2025-09-17 | LeeWas / Tamedia | 29 8% | 17 9% | 13 7% | 13 5% | 9 7% | 7 4% | — | (8 0%) |
| 2025-09-03 – 2025-09-16 | YouGov | 27% | 17% | 15% | 14% | 9% | 9% | — | (9%) |
| 2025-08-25 – 2025-09-11 | Sotomo / SRG SSR | 30 4% | 18 8% | 13 6% | 13 3% | 10 3% | 6 1% | 1 5% | (6 0%) |
| 2025-08-12 – 2025-08-25 | YouGov | 27% | 17% | 16% | 14% | 8% | 9% | — | (9%) |
| 2025-07-08 – 2025-07-14 | YouGov | 26% | 17% | 15% | 14% | 9% | 9% | — | (10%) |
| 2025-01-09 – 2025-02-07 | YouGov | 26% | 17% | 16% | 14% | 10% | 9% | — | (8%) |
| 2024-10-28 – 2024-11-22 | YouGov | 26% | 18% | 15% | 15% | 9% | 9% | — | (8%) |
| 2024-10-28 – 2024-11-11 | Sotomo | 29 9% | 17 8% | 14 1% | 14 3% | 9 5% | 6 6% | 2% | (5 8%) |
| 95 | 95 | 750 | |
| 2002 | 1 | 1 | 10 |
| 2003 | 6 | 6 | 50 |
| 2004 | — | — | — |
| 2005 | — | — | — |
| 2006 | 2 | 2 | 18 |
| 2007 | 10 | 10 | 99 |
| 2008 | — | — | — |
| 2009 | 1 | 1 | 7 |
| 2010 | 3 | 3 | 35 |
| 2011 | 10 | 10 | 84 |
| 2012 | 3 | 3 | 21 |
| 2013 | 2 | 2 | 14 |
| 2014 | 4 | 4 | 31 |
| 2015 | 9 | 9 | 81 |
| 2016 | 3 | 3 | 21 |
| 2017 | 2 | 2 | 14 |
| 2018 | 5 | 5 | 37 |
| 2019 | 8 | 8 | 60 |
| 2020 | 1 | 1 | 8 |
| 2021 | 2 | 2 | 13 |
| 2022 | 2 | 2 | 13 |
| 2023 | 9 | 9 | 60 |
| 2024 | 4 | 4 | 25 |
| 2025 | 8 | 8 | 49 |
| 2026 | — | — | — |