Iohannes (Greek: Ίωάννης; c. 440–482) was a politician of the Eastern Roman Empire.
In 467 he was consul posterior, chosen by the Eastern court, together with Illustrius Pusaeus.
Between 467 and 468 he was comes et magister officiorum, and later praetorian prefect of Illyricum (he was in office in 479); he was known as a fair administrator and a protector of arts.
In 479, during the revolt of Theodoric Strabo, Iohannes was in Thessalonica, where his life was in danger twice.
Together with Sabinianus Magnus, he successfully suggested that Emperor Zeno refuse a truce with Theodoric and keep fighting him.