Hippo Regius is the ancient name of the modern city of Annaba, Algeria. It historically served as an important city for the Phoenicians, Berbers, Romans, and Vandals. Hippo was the capital city of the Vandal Kingdom from 435 to 439 AD. until it was shifted to Carthage following the Vandal capture of Carthage (439).

The Roman Catholic Diocese of Constantine (-Hippone) is a Roman Catholic diocese in the ecclesiastical province of Algiers in Algeria.