The Landtag of Baden-Württemberg is the diet of the German state of Baden-Württemberg. It convenes in Stuttgart and currently consists of 154 members of five political parties. The majority before the 2021 election was a coalition of the Alliance 90/The Greens and the Christian Democratic Union (CDU), supporting the cabinet of Green Minister-President Winfried Kretschmann.

Baden-Württemberg, commonly shortened to BW or BaWü, is a German state in Southwest Germany, east of the Rhine, which forms the southern part of Germany's western border with France. With more than 11.07 million inhabitants as of 2019 across a total area of nearly 35,752 km2 (13,804 sq mi), it is the third-largest German state by both area and population. As a federated state, Baden-Württemberg is a partly-sovereign parliamentary republic. The largest city in Baden-Württemberg is the state capital of Stuttgart, followed by Mannheim and Karlsruhe. Other major cities are Freiburg im Breisgau, Heidelberg, Heilbronn, Pforzheim, Reutlingen, Tübingen, and Ulm.