Gaius Valerius Caburus (fl. 1st century BC) was a leader of the Helvii, a relatively small Celtic polity whose territory was more or less equivalent to the Vivarais (the French department Ardèche), on the northern border of Gallia Transalpina. Caburus was granted Roman citizenship in 83 BC by Gaius Valerius Flaccus during his governorship of Gaul. The date of his last known activity indicates that he was probably between the ages of twenty and thirty at the time, and almost certainly under thirty-five. Caburus took his patron's gentilic name, as was customary for naturalized citizens.