Gaius Julius Erucius Clarus Vibianus (died 197 CE) was a Roman politician and senator.
He was the son of Gaius Erucius Clarus, consul in 170 CE, who belonged to the powerful equestrian family of the Erucii.
His paternal grandfather, Sextus Erucius Clarus, was consul in 146 CE, and before that City Prefect of Rome.
His great-grandfather, who was consul suffectus in 117 CE, was the brother (or perhaps half-brother) of Gaius Septicius Clarus.
After the assassination of Pertinax, Vibianus initially survived the purges of the new emperor Septimius Severus that claimed the lives of fellow consuls Quintus Pompeius Sosius Falco and Marcus Silius Messala.