Gaius Vibius Marsus, whom Tacitus calls "vetustis honoribus studiisque illustris", was a Roman senator active during the Principate.
Marsus was Suffect consul for the second half of the year 17 with Lucius Voluseius Proculus as his colleague.
[1] He was mentioned in the year 19 as one of the most likely persons to obtain the government of Syria,[2] but the post wound up going to Gnaeus Sentius Saturninus instead.
[3] In the same year he was sent to summon Gnaeus Calpurnius Piso to Rome to stand his trial.
[4] The name of "Gaius Vibius Marsus", proconsul, appears on several coins of Utica in Africa, struck in the reign of Tiberius: they probably relate to this Vibius Marsus; and as he was disappointed in obtaining the province of Syria in the reign of Tiberius, he may have been appointed to that of Africa.