Monte Massico (Latin: Mons Massicus) is a mountain situated in the Italian Province of Caserta (Campania) between the rivers Volturno and Garigliano.

It projects south-west from the volcanic system of Rocca Monfina (see Suessa Aurunca) as far as the sea, and separates the lower course of the Liris from the plain of Campania.

It consists of limestone, with a superstratum of pliocenic and volcanic masses, and was once an island; its highest point is 811 meters (2661 feet) above sea-level.

Domitian considerably increased its importance by the construction of the Via Domitiana, which left the Via Appia here and ran to Cumae and Puteoli, and it was he, no doubt, who raised it to the position of colonia Flavia.

The town was destroyed by the Saracens, but some ruins of it are still visible two miles north-west of the modern village of Mondragone - the mineral springs which still rise here were frequented in antiquity.