The Landtag of North Rhine-Westphalia is the state parliament (Landtag) of the German federal state of North Rhine-Westphalia, which convenes in the state capital of Düsseldorf, in the eastern part of the district of Hafen. The parliament is the central legislative body in the political system of North Rhine-Westphalia. In addition to passing of laws, its most important tasks are the election of the Minister-President of the state and the administration of the government. The current government is a coalition of the CDU and the Greens, supporting the cabinet of Minister-President Hendrik Wüst since June 2022.

A Landtag is generally the legislative assembly or parliament of a federated state or other subnational self-governing entity in German-speaking nations. It is usually a unicameral assembly exercising legislative competence in non-federal matters.