Duke of Burgundy (Fr.: duc de Bourgogne) was a title borne by the rulers of the Duchy of Burgundy, a small portion of traditional lands of Burgundians west of river Saône which in 843 was allotted to Charles the Bald's kingdom of West Franks. Under the Ancien Regime, the Duke of Burgundy was the premier lay peer of the kingdom of France.
Beginning with Robert II of France, the title has been held by the Capetians, the French royal family. It was granted to Robert's younger son, Robert, who founded the House of Burgundy. When the senior line of the House of Burgundy became extinct, it was inherited by John II of France through proximity of blood. John granted the duchy as an appanage for his younger son, Philip the Bold. The Valois Dukes of Burgundy became dangerous rivals to the senior line of the House of Valois. When the male line of the Valois Dukes of Burgundy became extinct, it was confiscated by Louis XI of France. From then on, the title was never given again to a younger son.
Today, the title is used by the House of Bourbon as a revived courtesy title.