Princess Marie Amelie of Baden (Marie Amelie Elisabeth Caroline; 11 October 1817 – 17 October 1888) was the youngest daughter of Charles, Grand Duke of Baden and Stéphanie de Beauharnais,. In 1843, she married the Scottish nobleman William Hamilton, Marquess of Douglas and Clydesdale. They became the Duke and Duchess of Hamilton upon the death of William's father in 1852. Their only daughter Mary married the future Albert I, Prince of Monaco and was the mother of Louis II.

Princess Marie was a cousin of Napoleon III of France, as well as a friend of his and his wife's, Empress Eugénie. She often accompanied the couple at official events, and provided them lodging when they visited her outside France.

Princess Marie Amelie was born in Karlsruhe, the youngest daughter of Charles, Grand Duke of Baden, and his wife Stéphanie de Beauharnais, the adopted daughter of Napoleon I of France. Charles' daughters married into several great European ruling families. Marie Amelie's older sister Princess Louise married the Swedish prince Gustav, Prince of Vasa, and her other sister Princess Josephine married Karl Anton, Prince of Hohenzollern. Louise was the mother of Queen Carola of Saxony, while Josephine was the mother of Carol I of Romania and Queen Stephanie of Portugal.

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