The Italian Catholic Diocese of Frosinone-Veroli-Ferentino (Latin: Dioecesis Frusinatensis-Verulana-Ferentina) has existed since 1986. In that year the Diocese of Ferentino was united into the Diocese of Veroli-Frosinone; which was the name of the historic Diocese of Veroli from 1956. It is immediately subject to the Holy See.
