The Diocese of Trapani (Latin: Dioecesis Drepanensis) is a Latin diocese of the Catholic Church in Sicily.

It is a suffragan of the archdiocese of Palermo.

Trapani was subject to the see of Mazzara, from the Norman Conquest until 1844, when the diocese was created.

[1] This article incorporates text from a publication now in the public domain: Herbermann, Charles, ed.

New York: Robert Appleton Company.