Adalbert (died 15 June 970) was the 17th Bishop of Passau from 946 to 970.^[1][2][3][4]

In his reign was the fateful battle on the Lechfeld of 955, in which Emperor Otto I defeated the Hungarians. For the Diocese of Passau, this meant that it was now again able to exert its effectiveness in the land below the Enns (i.e. Lower Austria).^{[citation needed]}