Marie Antoinette Murat (3 January 1793, Cahors – 19 January 1847, Sigmaringen) was Princess of Hohenzollern-Sigmaringen as the wife of Karl, Prince of Hohenzollern-Sigmaringen.

Marie Antoinette was the niece of Joachim Murat, King of Naples from 1808 to 1815 and a brother-in-law of Napoleon Bonaparte, through marriage to Napoleon's youngest sister, Caroline Bonaparte.

Marie Antoinette was a posthumous daughter of Pierre Murat (1748-1792), elder brother of Joachim Murat, King of Naples (1808-1815) and his wife, Louise d'Astorg (1762-1832), daughter of Aimery d'Astorg (1721-1768) and Marie d'Alanyou (b.

Marie Antoinette married Karl, Hereditary Prince of Hohenzollern-Sigmaringen, the eldest son of Anton Aloys, Prince of Hohenzollern-Sigmaringen and his wife, Princess Amalie Zephyrine of Salm-Kyrburg, on 4 February 1808[2] in Paris.

Marie Antoinette and Charles had four children: