The Schleswig-Holstein Landtag is the state parliament of the German state of Schleswig-Holstein. It convenes in the state's capital Kiel and currently consists of 69 members of five parties. The current majority consists of coalition of the Christian Democratic Union and the Greens, supporting the cabinet of Minister President Daniel Günther.

Schleswig-Holstein is the northernmost of the 16 states of Germany, comprising most of the historical Duchy of Holstein and the southern part of the former Duchy of Schleswig. Its capital city is Kiel; other notable cities are Lübeck and Flensburg. It covers an area of 15,763 km2 (6,086 sq mi), making it the 5th smallest German federal state by area.