Countess Maria Antonie Gräfin von Waldstein Herrin zu Wartenberg (4 March 1771, Vienna – 17 January 1854, Vienna) was a Bohemian noblewoman.^[1] By birth, she was a member of the prominent House of Waldstein, maternal grandmother of King Ferdinand II of Portugal and great-grandmother of King Ferdinand I of Bulgaria.

Born into an old House of Waldstein, Antonia was the fourth child of Count Georg Christian von Waldstein (1743–1791) and wife, Countess Elisabeth Ulfeldt (1747–1791),^[1] and is the great-granddaughter of the notorious Count Corfitz Ulfeldt. In Vienna on 13 February 1792, Antonia married the Hungarian nobleman Ferenc József, Prince Koháry de Csábrág et Szitnya,^[1] a member of the enormously affluent House of Koháry, to whom she bore two children; Ferenc (1792–1795) and Mária Antónia (1797–1862) who married the German Prince Ferdinand of Saxe-Coburg and Gotha and bore four children.

• Wurzbach, Constantin (1885). Biographisches Lexikon des Kaisertums Österreich - Zweiundfünfzigster Teil - Vrcevic - Wallner [Biographical Encyclopedia of the Austrian Empire - Fifty-Second Part - Vrcevic - Wallner] (in German). Vol. 52. Graz: Universitätsbibliothek Graz.