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Thepolitics of Brandenburg takes place within a framework of afederalparliamentaryrepresentative democraticrepublic, where theFederal Government of Germany exercises sovereign rights with certain powers reserved to the states of Germany includingBrandenburg. The four main parties are the centre-leftSocial Democratic Party of Germany (SPD), the far-rightAlternative for Germany (AfD), the populist leftSahra Wagenknecht Alliance (BSW), and the centre-rightChristian Democratic Union.
Every five years, all Germans residing in the state over the age of 18 elect the members of theLandtag of Brandenburg. This regionalparliament orlegislature then elects theminister-president and confirms the cabinet members.
TheSocial Democratic Party of Germany (SPD) has been the biggest party in every election since1990 Brandenburg state election.

| Election year | Total seats | Seats won | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| SPD | CDU | PDS | FDP | Grüne | DVU | Linke | BVB/FW | AfD | BSW | ||
| 1990 | 88 | 36 | 27 | 13 | 6 | 6 | |||||
| 1994 | 88 | 52 | 18 | 18 | |||||||
| 1999 | 89 | 37 | 25 | 22 | 5 | ||||||
| 2004 | 88 | 33 | 20 | 29 | 6 | ||||||
| 2009 | 88 | 31 | 19 | 7 | 5 | 26 | |||||
| 2014 | 88 | 30 | 21 | 6 | 17 | 3 | 11 | ||||
| 2019 | 88 | 25 | 15 | 10 | 10 | 5 | 23 | ||||
| 2024 | 88 | 32 | 12 | 30 | 14 | ||||||
| No | Constituency | Member[1] | 2021 | Voters | 2017 | 2013 | 2009 | 2005 | 2002 | 1998 | 1994 | 1990 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 56 | Prignitz – Ostprignitz-Ruppin – Havelland I | Wiebke Papenbrock | SPD | 172,726 | CDU | CDU | SPD | SPD | SPD | SPD | SPD | CDU | |
| 57 | Uckermark – Barnim I | Stefan Zierke | SPD | 182,836 | CDU | CDU | Left | SPD | SPD | SPD | SPD | SPD | |
| 58 | Oberhavel – Havelland II | Ariane Fäscher | SPD | 249,331 | CDU | CDU | SPD | SPD | SPD | SPD | SPD | SPD | |
| 59 | Märkisch-Oderland – Barnim II | Simona Koß | SPD | 230,391 | CDU | CDU | Left | SPD | SPD | Created for 2002 election | |||
| 60 | Brandenburg an der Havel – Potsdam-Mittelmark I – Havelland III – Teltow-Fläming I | Sonja Eichwede | SPD | 202,955 | CDU | SPD | SPD | SPD | SPD | SPD | SPD | SPD | |
| 61 | Potsdam – Potsdam-Mittelmark II – Teltow-Fläming II | Olaf Scholz | SPD | 232,797 | SPD | CDU | SPD | SPD | SPD | SPD | SPD | SPD | |
| 62 | Dahme-Spreewald – Teltow-Fläming III | Wiebke Papenbrock | SPD | 252,744 | CDU | CDU | SPD | SPD | SPD | Created for 2002 election | |||
| 63 | Frankfurt (Oder) – Oder-Spree | Mathias Papendieck | SPD | 191,387 | CDU | CDU | Left | SPD | SPD | SPD | SPD | CDU | |
| 64 | Cottbus – Spree-Neiße | Maja Wallstein | SPD | 171,267 | CDU | CDU | Left | SPD | SPD | SPD | SPD | CDU | |
| 65 | Elbe-Elster – Oberspreewald-Lausitz | Hannes Walter | SPD | 162,410 | CDU | CDU | CDU | SPD | SPD | Created for 2002 election | |||
| Election year | % won | % won | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| CDU | SPD | PDS | FDP | Grüne | NDP | Linke | AfD | BSW | |||
| 1990 | 100 | 36.3 | 32.9 | 11.0 | 9.7 | 6.6 | |||||
| 1994 | 100 | 28.1 | 45.1 | 19.3 | 2.6 | 2.9 | |||||
| 1998 | 100 | 20.7 | 43.9 | 20.0 | 2.8 | 3.4 | |||||
| 2002 | 100 | 22.3 | 46.4 | 17.2 | 5.8 | 4.5 | |||||
| 2005 | 100 | 20.6 | 35.8 | 6.9 | 5.1 | 3.2 | 26.6 | ||||
| 2009 | 100 | 23.6 | 25.1 | 9.3 | 6.1 | 28.5 | |||||
| 2013 | 100 | 34.8 | 23.1 | 2.5 | 4.7 | 22.4 | 6.0 | ||||
| 2017 | 100 | 26.7 | 17.6 | 7.1 | 5.0 | 17.2 | 20.2 | ||||
| 2021 | 100 | 15.3 | 29.5 | 9.3 | 9.0 | 8.5 | 18.1 | ||||
| 2025 | 100 | 18.1 | 14.8 | 3.2 | 6.6 | 10.7 | 32.5 | 10.7 | |||