The Leningrad Military District is a military district of the Armed Forces of the Russian Federation. In 2010 it was merged with the Moscow Military District, the Northern Fleet and the Baltic Fleet to form the new Western Military District. In December 2022, Defense Minister Sergey Shoigu proposed to reestablish it along with the Moscow Military District, a decision confirmed in June 2023 by Deputy Chief of the General Staff Yevgeny Burdinsky. On December 17, 2023 Vladimir Putin announced plans to recreate the Leningrad Military District as a reaction to Finland joining NATO. The district was formally reconstituted on February 26, 2024 by a Presidential Decree.

Military districts are formations of a state's armed forces which are responsible for a certain area of territory. They are often more responsible for administrative than operational matters, and in countries with conscript forces, often handle parts of the conscription cycle.