XV Corps was a British infantry corps during World War I.
XV Corps was formed in Egypt on 9 December 1915 and then reformed in France on 22 April 1916 under Lieutenant-General Sir Henry Horne. It took part in the Battle of the Somme in 1916.
Prior to the armistice, the corps halted on the Schelde on 10 November 1918. It was composed of the following units, the 36th Division having been transferred from the X Corps on 9 November 1918:
Commanders included: