Prince Amedeo, 3rd Duke of Aosta was the third Duke of Aosta and a first cousin once removed of the King of Italy, Victor Emmanuel III. During World War II, he was the Italian Viceroy of Italian East Africa.

Duke of Aosta was a title in the Italian nobility. It was established in the 13th century when Frederick II, Holy Roman Emperor, made the County of Aosta a duchy. The region was part of the Savoyard state and the title was granted to various princes of the House of Savoy, second sons of the reigning king of Sardinia or king of Italy.