Ermanaric (died 376) is a Greuthungian Gothic King who before the Hunnic invasion evidently rules an enormous area north of the Black Sea.

Contemporary historian Ammianus Marcellinus recounts him as a "most warlike man" who "ruled over extensively wide and fertile regions".

Late historian Jordanes describes him as a Gothic Alexander the Great who "ruled all the nations of Scythia and Germania as they were his own".

Ermanaric appears frequently in Scandinavian and Anglo-Saxon legend.