JUVENTAS (Latin for "youth": later Juventus), in Roman mythology, the tutelar goddess of young men.
In the front court of the, temple of Minerva on the Capitol there was a chapel of Juventas, in which a coin had to be deposited by each youth on his assumption of the toga virilis, and sacrifices were offered on behalf of the rising manhood of the state.
In connexion with this chapel it is related that, when the temple was in course of erection, Terminus, the god of boundaries, and Juventas refused to quit the sites they had already appropriated as sacred to themselves, which accordingly became part of the new sanctuary.
It should be observed that in the oldest accounts there is no mention of Juventas, whose name (with that of Mars) was added in support of the augural prediction.
In 218 B.C., by order of the Sibylline books, a lectisternium was prepared for Juventas and a public thanksgiving to Hercules, an association which shows the influence of the Greek Hebe, the wife of Heracles.
In 207 Marcus Livius Salinator, after the defeat of Hasdrubal at the battle of Sena, vowed another temple to Juventas in the Circus Maximus, which was dedicated in 191 by C. (or M.) Licinius Lucullus; it was destroyed by fire in 16 B.C. and rebuilt by Augustus.
In imperial times, Juventas personified, not the youth of the Roman state, but of the future emperor.