List of Catholic dioceses in Italy

The following is the List of the Roman Catholic dioceses in Italy. The Roman Catholic Church in Italy is composed per May 2017 of 227 ses ('particular churches'), most of which are (arch)dioceses led by bishops. Dioceses led by archbishops are called archdioceses. There are 40 Metropolitan archdioceses (including the papal Holy See and the Patriarchate of Venice), each serving as the seat of a Roman Catholic ecclesiastical province in Italy. There are also approximately 4 non-metropolitan archdioceses and thus there are approximately 46 archbishops in total in the Catholic Church of Italy.

They all belong to the Latin Church, besides the three sees of the Italo-Albanian Catholic Church sui iuris (which is Eastern Catholic, practicing the (Byzantine Rite in Albanian language]]), and are organized in into 16 ecclesiastical regions (Sicily, Sardinia and 14 in peninsular Italy), mostly corresponding to the 20 administrative regions of Italy (a few being grouped).

All Latin church sees use the Roman Rite proper, except for the Metropolitan Archdiocese of Milan, which has its particular Ancient variation, the Ambrosian Rite.

In Rome, there are also an Apostolic Nunciature (papal diplomatic representation, ambassador-level) to the Republic of Italy and two more Holy See Representations (Permanent representative-level) : to the Food and Agricultural Organization of the United Nations (FAO) and to the International Institute for the Unification of Private Law (UNIDROIT).

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