Fanny de Beauharnais, née Marie-Anne-Françoise Mouchard (4 October 1737, Paris – 2 July 1813), was a French lady of letters and salon-holder.
She was the mother of French politician Claude de Beauharnais.
She was the grandmother of Stéphanie de Beauharnais, Grand Duchess of Baden, and through her she is the ancestor of former royal families of Romania and Yugoslavia, and the present royal families of Belgium, of Luxembourg and of Monaco.