The XIV Army Corps / XIV AK () was a corps level command of the German Army before and during World War I. It was, effectively, also the army of the Grand Duchy of Baden, which, in 1871, had been integrated into the Prussian Army command structure, as had the armies of most German states. Both divisions and the bulk of the corps' support units were from the grand duchy. The corps was established in 1870, after the Siege of Strasbourg.