Mentana is a town and comune, former bishopric and present Latin Catholic titular see in the Metropolitan City of Rome, Lazio, central Italy.

[4] It was a Latin town, but was considered by some to be Sabine, and, like Fidenae and Ficulea, was excluded from the first region by Augustus, who made the Anio river its northern boundary.

Subsequently, Nomentum received the civitas sine suffragio, and in its municipal constitution the chief magistrate even in imperial times bore the title of dictator.

The castle was acquired by the Capocci family, and later the Holy See entrusted it to the Benedictine monks of San Paolo fuori le Mura.

On 3 November 1867,[8] the city was the site of the Battle of Mentana between French-Papal troops and the Italian volunteers led by Giuseppe Garibaldi, who were attempting to capture Rome in order to incorporate it into the newly unified Kingdom of Italy.