Vithicabius (German: Vithicab) was an Alemannic petty king from 360 to 368. He was a son of Vadomarius, and succeeded his father as king after the latter had been banished to Hispania by emperor Julian. He had grown up in Roman custody. Ammianus Marcellinus describes Vithicabius as a physically weak, but a brave and aggressive leader. Although having promised Julian to maintain peace, Vithicabius continued raiding Roman territory. He was assassinated in 368 under Valentinian I by a bribed servant, but the Alemannic raids on Roman territory continued nevertheless.