Prince Albert Casimir August of Saxony, Duke of Teschen (11 July 1738, Moritzburg, Electorate of Saxony – 10 February 1822, Vienna) was a German prince from the House of Wettin who married into the Habsburg imperial family. He was noted as an art collector and founded the Albertina in Vienna, one of the largest and finest collections of old master prints and drawings in the world.

He was a younger son of king Augustus III of Poland (who was also Elector of Saxony) and Maria Josepha of Austria, a first cousin of empress Maria Theresa, being the eldest daughter of late Emperor Joseph I. Prince Albert of Saxony, Duke of Teschen, was also one of the godparents to his namesake Prince Albert of Saxe-Coburg and Gotha.

Young Albert was specifically chosen by Archduchess Maria Christina of Austria to be her husband. This was a special favour granted by her mother, the great empress Maria Theresa of Austria because marriages of imperial children were usually used for diplomatic purposes. Still, the betrothal and wedding had to wait until the death of her father Emperor Francis I and the wedding decorations were black because it occurred during the official mourning period after his death. From his father-in-law's estate, Albert received the territory of Teschen in Austrian Silesia and was accordingly given the title of Duke of Teschen. Since he became a member of the Habsburg-Lorraine family, the title Archduke was also given to him.

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