Adalbero of Luxembourg (German: Adalbero von Luxemburg) (? - 1036/7) was the Anti-Archbishop of Trier in 1008. Adalbero was a son of Count Siegfried I of Luxembourg and a brother of Kunigunde, the wife of the Emperor Henry II. Supported by his family, Adalbero seized the Archbishopric of Trier in 1008 after the death of Ludolph despite the cathedral chapter electing Megingod, the cathedral provost in Mainz. Adalbero placed himself inside the fortress of Moselbrücke. Megingod, supported by the Pope and the Emperor, invaded and captured the city of Trier but could not take the archbishop's palace. The emperor's troops surrounded the palace and induced Adalbero to leave for a small remuneration. But soon after the emperor left Adalbero again seized Trier and forced Megingod to flee to Coblenz.