Bernard (or Bernat) of Septimania (795–844), son of William of Gellone, is the Frankish Duke of Septimania and Count of Barcelona from 826 to 832 and again from 835 to his execution.

He is also count of Carcassonne from 837.

He is appointed to succeed his fellow Frank Rampon.

During his career, he is one of the closest counselors of the Emperor Louis the Pious, a leading proponent of the war against the Moors, and opponent of the interests of the local Visigothic nobility.