Rocca d'Arce is a comune (municipality) in the Province of Frosinone in the Italian region Lazio, located about 100 kilometres (62 mi) southeast of Rome and about 20 kilometres (12 mi) southeast of Frosinone.

Rocca d'Arce borders the following municipalities: Arce, Colfelice, Fontana Liri, Roccasecca, Santopadre.

According to the archeologist Italo Biddittu, human presence is evidenced during the Copper Age, whilst a settlement arose in the Iron Age.

The Volsci built a fortress around the mountain, still partially visible today.

Due to its strategic position, the fortress had a moderate importance in the medieval period.