Louis Joseph de France (Louis Joseph Xavier François; 22 October 1781 – 4 June 1789) was the second child and first son of King Louis XVI of France and Marie Antoinette.
As son of a king of France, he was a fils de France ("Son of France"), and as the eldest son and heir apparent, he was Dauphin of France, (the twenty-sixth "heir to the throne" of the Valois and Bourbon monarchies).
Louis Joseph died at age seven of tuberculosis and was succeeded as Dauphin de France by his four-year-old brother Louis Charles.