Robert de Borron was a writer of French "romances" in verse. He was active in the late 12th and early 13th centuries, with approximate dates of 1170-1212 C.E. De Borron (also spelled "Boron") was evidently from the village of Boron, near Delle, in France. He may have been a cleric or perhaps a knight, though this is not known.

De Borron is noted for his trilogy of romances in verse on Joseph of Arimathea, Merlin, and Perceval, all figures which he connected to the Arthurian legends. A few years earlier, Chrétien de Troyes had written about the Holy Grail, but it was de Borron who developed the theme of the quest for the serving dish used at the Last Supper. He supplied the legend with the symbolism of a spiritual quest and Christianized it in a way that had not previously been done. De Borron suggested that the Grail had held the blood of Christ from the cross, thus making of it a Christian relic.