| Abbr. | Logo | Ideology | Founded | Founder | Leader | Website |
| SV |  | Democratic socialism, Eco-socialism, Feminism | 16.03.1975 | Kirsti Bergstø | http://sv.no |
Elections
| Elections | % | Votes | Seats | |
| 2021 | 7,64 | 228.063 | 13 | 5th |
| 2017 | 6,02 | 176.222 | 11 | 5th |
| 2013 | 4,09 | 116.021 | 7 | 7th |
| 2009 | 6,20 | 166.361 | 11 | 4th |
| 2005 | 8,83 | 232.971 | 15 | 4th |
| 2001 | 12,55 | 316.397 | 23 | 4th |
| Leaders | |
| 1975 – 1976 | Berit Ås |
| 1976 – 1983 | Berge Furre |
| 1983 – 1987 | Theo Koritzinsky |
| 1987 – 1997 | Erik Solheim |
| 1997 – 2012 | Kristin Halvorsen |
| 2012 – 2023 | Audun Lysbakken |
| 2023 – | Kirsti Bergstø[ |
