This page is about a Roman author whose cognomen was Avienus. For the Roman gens, see Aviena (gens).
Avienus was a Latin writer of the 4th century AD. An inscription from Bulla Regia reports his full name as "Postumius Rufius Festus who is also Avienius". He was a native of Volsinii in Etruria, from the distinguished family of the Rufii Festi. He was twice appointed consul, if an inscription published by the 17th-century antiquariesJacob Spon and Raffaello Fabretti really refers to this Avienus.