| Abbr. | Logo | Ideology | Founded | Founder | Leader | Website | European Parliament Group |
| EK |  | Populism | 12.10.1991 | Edgar Savisaar | Mihhail Kõlvart | http://keskerakond.ee |  |
Elections
| Elections | % | Votes | Seats | ||
| 2023 | 15,28 | 93.254 | 16 | 3rd | |
| 2019 | EU | 14,39 | 47.799 | 1 | 3rd |
| 2019 | 23,10 | 129.617 | 26 | 2nd | |
| 2015 | 24,76 | 142.442 | 27 | 2nd | |
| 2014 | EU | 22,91 | 73.419 | 1 | 2nd |
| 2011 | 23,32 | 134.090 | 26 | 2nd | |
| 2009 | EU | 26,07 | 103.506 | 2 | 1st |
| 2007 | 26,08 | 143.518 | 29 | 2nd | |
| 2004 | EU | 17,53 | 40.704 | 1 | 2nd |
| 2003 | 25,40 | 125.709 | 28 | 1st |
| Leaders | |
| 1991 – 2016 | Edgar Savisaar |
| 2016 – 2023 | Jüri Ratas |
| 2023 – | Mihhail Kõlvart |
