The Archdiocese of Fermo is a Latin archdiocese of the Catholic Church in northern Italy, with its seat in the city of Fermo, Marche. It was established as the Diocese of Fermo in the 3rd century, and elevated to an archdiocese by Pope Sixtus V on 24 May 1589. The archiepiscopal seat is Fermo Cathedral. The current archbishop is Rocco Pennacchio.

Fermo is a town and comune of the Marche, Italy, in the Province of Fermo.