Guillaume Emmanuel Guignard de Saint-Priest
Guillaume Emmanuel Guignard by George Dawe
Other name	Emmanuil Francevich Saint-Priest
Born	4 March 1776 Constantinople, Ottoman Empire
Died	29 March 1814 (aged 38) Laon, France
Allegiance	Russian Empire
Rank	Major-general
Conflicts	Napoleonic Wars Battle of Großdrebnitz Battle of Reims
Awards	Order of St. Anna, 1st class Order of St. Vladimir, 2nd class Order of St. George, 2nd class Order of St. George, 3rd class Order of St. George, 4th class Gold Sword for Bravery with diamonds Order of St. John of Jerusalem Pour le Mérite

Guillaume Emmanuel Guignard, vicomte de Saint-Priest^[a] (4 March 1776, in Constantinople – 29 March 1814) was a French émigré general who fought in the Imperial Russian Army during the French Revolutionary Wars and the Napoleonic Wars.

He was the eldest son of prominent émigré diplomat François-Emmanuel Guignard, comte de Saint-Priest (1735–1821), one of King Louis XVI's last ministers, and Constance Wilhelmine de Saint-Priest.

Guillaume Emmanuel became a major-general in the Russian army under Emperor Alexander I of Russia, and fought against the forces of Napoleon.^[1] Some weeks before the Battle of Leipzig, he and his cavalry defeated the troops of French brigade general François Basile Azemar [fr] in the Battle of Großdrebnitz. Saint-Priest was defeated and mortally wounded during the 1814 Allied invasion of France in the Battle of Reims and died two weeks later at Laon.