Csernoch was created Cardinal-Priest of "Sant'Eusebio" in the consistory of 25 May 1914 by Pope Pius X. He received the red biretta from Archduke Franz Ferdinand of Austria (who was to be assassinated in Sarajevo on 28 June 1914). He was decorated with the Grand Cross of the Order of Saint Stephen in 1915. On 30 December 1916, as Primate of Hungary he crowned King Charles IV of Hungary, who was at the same time Charles I of Austria. He participated in the conclave of 1914, which elected Pope Benedict XV, and in that of 1922, which elected Pope Pius XI. He died in office in 1927.