The 84th Infantry Division (84. Infanterie-Division) was a unit of the Imperial German Army in World War I. The division was formed in November 1914 as the "Division Posen 2", part of the Posen Corps (Korps Posen), and became the 84th Infantry Division in June 1915. It was initially formed from the garrison infantry regiments of Fortress Posen (Festung Posen). The division was disbanded in 1919 during the demobilization of the German Army after World War I.