The Army Group Rupprecht of Bavaria or Army Group A (German: Heeresgruppe Kronprinz Rupprecht von Bayern) was an Army Group of the German Army, which operated on the Western Front under command of Rupprecht, Crown Prince of Bavaria, between 28 August 1916 and 11 November 1918 during World War I.

At the start of the Battle of the Somme (July 1916), the German 2nd Army had grown to such an extent, that a decision was made to split it into two armies.

The new commander of the reduced 2nd Army, Max von Gallwitz, was also installed as commander of Army Group Gallwitz (Heeresgruppe Gallwitz) to co-ordinate the actions of both armies on the Somme.

The Army Group remained in place until the end of the war.

On 28 August 1916, Hermann von Kuhl was appointed as chief of staff of the army group.