The IX Army Corps () was a corps of the Royal Italian Army between 1877 and 1944.
the IX Army Corps participated in World War I.
In 1940, the IX Corps was assigned to defend the south-eastern coast between Pescara and Lecce. The headquarters were located in Putignano in the province of Bari.<br> The Corps remained here for the duration of the war, and after the Armistice of Cassibile on 8 September 1943, the Corps moved to Brindisi in Apulia to escape capture by the Germans.<br> On 15 September 1943, it was renamed LI Army Corps to fight alongside the Allies, but this never came into effect.
1944 - On 1 July 1944, it assumed the name of Military Command of Apulia and Lucania, with airport defense tasks around the harbours of Taranto and Brindisi.