Eugène Rose de Beauharnais, Prince Français, Prince of Venice, Viceroy of the Kingdom of Italy, Hereditary Grand Duke of Frankfurt, 1st Duke of Leuchtenberg and 1st Prince of Eichstätt ad personam (3 September 1781 – 21 February 1824) was the first child and only son of Alexandre, Vicomte de Beauharnais and Joséphine Tascher de la Pagerie, future wife of French Emperor Napoléon I.

He was born in Paris, France and became the stepson and adopted child (but not the heir to the imperial throne) of Napoleon. His natural father was executed during the revolutionary Reign of Terror. He commanded the Army of Italy and was viceroy of Italy under his stepfather.

Historians have looked upon him as one of the ablest of Napoleon's relatives.^{[citation needed]}