The VIII Army Corps / VIII AK () was a corps level command of the Prussian and then the Imperial German Armies from the 19th Century to World War I. Originating on 21 June 1815 as the General Command for the Grand Duchy of the Lower Rhine and established on 3 April 1820 as VIII Corps. The headquarters was in Koblenz and its catchment area was the Rhine Province and the Principality of Birkenfeld of the Grand Duchy of Oldenburg. The Corps served in the Austro-Prussian War. During the Franco-Prussian War it was assigned to the 1st Army.