Louis I, Duke of Anjou (23 July 1339 – 20 September 1384) was a French prince, the second son of John II of France and Bonne of Bohemia.

He died on the march and his claims and titles fell to his son and namesake, Louis II, who succeeded in ruling Naples for a time.

King John II and Louis' younger brother Philip were not so fortunate and were captured by the English, commanded by Edward, the Black Prince.

Despite his coronation at Avignon as King of Naples by Antipope Clement VII, Louis was forced to remain in France and Joan's troops were defeated by Charles of Durazzo, her second cousin and previous heir.

Joanna was killed in her prison in San Fele in 1382; Louis, with support of the Antipope, France, Bernabò Visconti of Milan and Amadeus VI of Savoy, and using the money he had been able to obtain during the regency, launched an expedition to regain the Kingdom of Naples from Charles.

Charles, who counted on the mercenary companies under John Hawkwood for a total of some 14,000 men, was able to divert the French from Naples to other regions of the kingdom and to harass them with guerrilla tactics.

On 9 July 1360, without the consent of his father,[3] Louis married Marie of Blois,[4] Lady of Guise, daughter of Charles, Duke of Brittany and Joanna of Dreux.