Archduke Peter Ferdinand of Austria, Prince of Hungary and Bohemia[citation needed] (Peter Ferdinand Salvator Karl Ludwig Maria Joseph Leopold Anton Rupert Pius Pancraz; 12 May 1874, in Salzburg, Austria-Hungary[citation needed] – 8 November 1948, in St. Gilgen, Salzburg, Austria[citation needed]) was an Austro-Hungarian archduke and an army commander in the Austro-Hungarian Army during World War I. Peter Ferdinand was the fourth child and third-eldest son of Ferdinand IV, Grand Duke of Tuscany and his wife Alice of Bourbon-Parma.

At the outbreak of World War I in August 1914, he was commander of the 25th Infantry Division, with which he fought against Russia in Galicia and southern Poland, as part of the Austro-Hungarian II Corps.

General Moritz von Auffenberg later blamed Peter Ferdinand's actions for preventing the encirclement of the entire 5th Russian army during the Battle of Komarów (1914).

His troops first defended the Ortler Range and then covered the flank of the 14th German Army during its advance in the Battle of Caporetto.

From 26 October 1918, in the last days of the war, he commanded the 10th Army in Trentino on behalf of Field Marshal Alexander von Krobatin.