Maria of Julich-Berg (c. 1450–1511) was a noblewoman from the House of Julich-Berg, a prominent family in the Duchy of Julich-Berg in present-day Germany. She was the daughter of William IV, Duke of Julich-Berg and Maria of Cleves, and her marriage to John III of Cleves helped strengthen political alliances in the region. Maria's lineage connected her to several influential families in Europe, including the House of Cleves. Her descendants played significant roles in the politics of the Holy Roman Empire and the Duchy of Cleves, contributing to the complex web of noble relationships during the late Middle Ages.