The following is a list of the Catholic dioceses in Italy. , the Catholic Church in Italy is divided into sixteen ecclesiastical regions. While they are similar to the 20 civil regions of the Italian state, there are some differences. Most ecclesiastical regions are in turn divided into a number of ecclesiastical provinces. The provinces are in turn divided into a number of dioceses. The sovereign state of Vatican City is part of the metropolitan province of Rome. A metropolitan bishop exercises a degree of leadership over a group of dioceses that are loosely subject (suffragan) to the care of the metropolitan see. This list excludes those archdioceses, dioceses and ecclesiastical territories that are immediately subject to the Holy See.
There are 227 sees ('particular churches'), most of which are dioceses led by a bishop. A diocese that is led by an archbishop is known as an archdiocese. There are 40 Metropolitan archdioceses which serve as the seat of an ecclesiastical province. This number includes the Holy See and the Patriarchate of Venice. There are also four archdioceses which are non-metropolitan, having been demoted by papal decree. This brings the number of archbishops in Italy and Vatican City to 44 (i.e. 40 + 4).
All the sees belong to the Latin Church apart from three Eastern Catholic sees of the Italo-Albanian Catholic Church that use the Byzantine Rite in the Albanian language. All sees of the Latin Church use the Roman Rite apart from the Metropolitan Archdiocese of Milan, which mainly uses the Ambrosian Rite.
Episcopal Conference of Italy
MapCode EcclesiasticalRegion EcclesiasticalProvince1Abruzzo-Molise L'Aquila in Abruzzo Chieti-Vasto in Abruzzo Pescara-Penne in Abruzzo Campobasso-Boiano in Molise2 Basilicata Potenza-Muro Lucano-Marsico Nuovo3 Calabria Calabria-Bova Catanzaro-Squillace Cosenza-Bisignano4 Campania Salerno-Campagna-Acerno Benevento Naples5 Emilia-Romagna Bologna Modena-Nonantola Ravenna-Cervia6 Lazio Rome7 Liguria Genoa8 Lombardy Milan9 Marche Ancona-Osimo Fermo Pesaro10 Piedmont Turin including Aosta Valley Vercelli in Piedmont11 Puglia Bari-Bitonto Foggia-Bovino Lecce Taranto12Sardinia Cagliari Oristano Sassari13Sicily Agrigento Catania Messina-Lipari Palermo Syracuse14TuscanyFlorencePisaSiena-Colle di Val d'Elsa-Montalcino15TrivenetoGorizia in Friuli-Venezia GiuliaUdine in Friuli-Venezia GiuliaTrento in Trentino-Alto Adige/SüdtirolVenice in Veneto16Umbria Perugia-Città della Pieve
Exempt
The following are immediately Subject to the Holy See, despite not being in the Pope's Ecclesiastical Province of Rome.
non-Metropolitan Archdiocese of Lucca non-Metropolitan Archdiocese of Spoleto-Norcia Diocese of Orvieto-Todi Diocese of Terni-Narni-Amelia Territorial Abbey of Monte Oliveto Maggiore Military Ordinariate of Italy Personal Prelature of Opus Dei
Italo-Albanian Catholic Church (Byzantine Rite, the only non-Latin dioceses in Italy) Eparchy of Lungro Eparchy of Piana degli Albanesi Territorial Abbacy of Santa Maria of Grottaferrata
Ecclesiastical Region of Abruzzo-Molise The ecclesiastical provinces of L'Aquila, Chieti-Vasto and Pescara-Penne are mainly situated in the civil region of Abruzzo while Campobasso-Boiano is situated in Molise.
Ecclesiastical Province of L'Aquila Archdiocese of L'Aquila Diocese of Avezzano Diocese of Sulmona-Valva
Ecclesiastical Province of Chieti-Vasto Metropolitan Archdiocese of Chieti-Vasto Archdiocese of Lanciano-Ortona
Ecclesiastical Province of Pescara-Penne Archdiocese of Pescara-Penne Diocese of Teramo-Atri
Ecclesiastical Province of Campobasso-Boiano Metropolitan Archdiocese of Campobasso-Boiano Diocese of Isernia-Venafro Diocese of Termoli-Larino Diocese of Trivento
Ecclesiastical Region of Basilicata Ecclesiastical Province of Potenza-Muro Lucano-Marsico Nuovo Archdiocese of Potenza-Muro Lucano-Marsico Nuovo Archdiocese of Acerenza Archdiocese of Matera-Irsina Diocese of Melfi-Rapolla-Venosa Diocese of Tricarico Diocese of Tursi-Lagonegro
Ecclesiastical Region of Calabria Ecclesiastical Province of Reggio Calabria-Bova Archdiocese of Reggio Calabria-Bova Diocese of Locri-Gerace Diocese of Mileto-Nicotera-Tropea Diocese of Oppido Mamertina-Palmi
Ecclesiastical Province of Catanzaro-Squillace Metropolitan Archdiocese of Catanzaro-Squillace Archdiocese of Crotone-Santa Severina Diocese of Lamezia Terme
Ecclesiastical Province of Cosenza-Bisignano Metropolitan Archdiocese of Cosenza-Bisignano Archdiocese of Rossano-Cariati Diocese of Cassano all'Jonio Diocese of San Marco Argentano-Scalea
Ecclesiastical Region of Campania Ecclesiastical Province of Salerno-Campagna-Acerno Metropolitan Archdiocese of Salerno-Campagna-Acerno Archdiocese of Amalfi-Cava de' Tirreni Diocese of Nocera Inferiore-Sarno Diocese of Teggiano-Policastro Diocese of Vallo della Lucania Territorial Abbey of Santissima Trinità di Cava de' Tirreni
Ecclesiastical Province of Benevento Metropolitan Archdiocese of Benevento Archdiocese of Sant'Angelo dei Lombardi-Conza-Nusco-Bisaccia Diocese of Ariano Irpino-Lacedonia Diocese of Avellino Diocese of Cerreto Sannita-Telese-Sant’Agata de’ Goti Territorial Abbey of Montevergine
Ecclesiastical Province of Naples Metropolitan Archdiocese of Naples Archdiocese of Capua Archdiocese of Sorrento-Castellammare di Stabia Diocese of Acerra Diocese of Alife-Caiazzo Diocese of Aversa Diocese of Caserta Diocese of Ischia Diocese of Nola Diocese of Pozzuoli Diocese of Sessa Aurunca Diocese of Teano-Calvi Territorial Prelature of Pompei o Beatissima Vergine Maria del SS.mo Rosario
Ecclesiastical Region of Emilia-Romagna Ecclesiastical Province of Bologna Metropolitan Archdiocese of Bologna Archdiocese of Ferrara-Comacchio Diocese of Faenza-Modigliana Diocese of Imola
Ecclesiastical Province of Modena-Nonantola Metropolitan Archdiocese of Modena-Nonantola Diocese of Carpi Diocese of Fidenza Diocese of Parma Diocese of Piacenza-Bobbio Diocese of Reggio Emilia-Guastalla
Ecclesiastical Province of Ravenna-Cervia Archdiocese of Ravenna-Cervia Diocese of Cesena-Sarsina Diocese of Forli-Bertinoro Diocese of Rimini Diocese of San Marino-Montefeltro
Ecclesiastical Region of Lazio Ecclesiastical Province of Rome
Diocese of Rome Suburbicarian See of Albano Suburbicarian See of Frascati Suburbicarian See of Palestrina Suburbicarian See of Porto-Santa Rufina Suburbicarian See of Sabina-Poggio Mirteto Suburbicarian See of Velletri-Segni Archdiocese of Gaeta Diocese of Anagni-Alatri Diocese of Civita Castellana Diocese of Civitavecchia-Tarquinia Diocese of Frosinone-Veroli-Ferentino Diocese of Latina-Terracina-Sezze-Priverno Diocese of Rieti Diocese of Sora-Aquino-Pontecorvo Diocese of Tivoli Diocese of Viterbo Territorial Abbey of Montecassino Territorial Abbey of Subiaco
Ecclesiastical Region of Liguria Ecclesiastical Province of Genoa Metropolitan Archdiocese of Genoa Diocese of Albenga-Imperia Diocese of Chiavari Diocese of La Spezia-Sarzana-Brugnato Diocese of Savona-Noli Diocese of Tortona Diocese of Ventimiglia-San Remo
Ecclesiastical Region of Lombardy Ecclesiastical Province of Milan Metropolitan Archdiocese of Milan Diocese of Bergamo Diocese of Brescia Diocese of Como Diocese of Crema Diocese of Cremona Diocese of Lodi Diocese of Mantua Diocese of Pavia Diocese of Vigevano
Ecclesiastical Region of Marche Ecclesiastical Province of Ancona-Osimo Metropolitan Archdiocese of Ancona-Osimo Diocese of Fabriano-Matelica Diocese of Jesi Diocese of Senigallia Territorial Prelature of Loreto
Ecclesiastical Province of Fermo Metropolitan Archdiocese of Fermo Archdiocese of Camerino-San Severino Marche Diocese of Ascoli Piceno Diocese of Macerata-Tolentino-Recanati-Cingoli-Treia Diocese of San Benedetto del Tronto-Ripatransone-Montalto
Ecclesiastical Province of Pesaro Metropolitan Archdiocese of Pesaro Archdiocese of Urbino-Urbania-Sant'Angelo in Vado Diocese of Fano-Fossombrone-Cagli-Pergola
Ecclesiastical Region of Piedmont Ecclesiastical Province of Turin Metropolitan Archdiocese of Turin Diocese of Acqui Diocese of Alba Pompeia Diocese of Aosta Diocese of Asti Diocese of Cuneo Diocese of Fossano Diocese of Ivrea Diocese of Mondovi Diocese of Pinerolo Diocese of Saluzzo Diocese of Susa
Ecclesiastical Province of Vercelli Metropolitan Archdiocese of Vercelli Diocese of Alessandria della Paglia Diocese of Biella Diocese of Casale Monferrato Diocese of Novara
Ecclesiastical Region of Puglia Ecclesiastical Province of Bari-Bitonto Metropolitan Archdiocese of Bari-Bitonto Archdiocese of Trani-Barletta-Bisceglie Diocese of Altamura-Gravina-Acquaviva delle Fonti Diocese of Andria Diocese of Conversano-Monopoli Diocese of Molfetta-Ruvo-Giovinazzo-Terlizzi
Ecclesiastical Province of Foggia-Bovino Metropolitan Archdiocese of Foggia-Bovino Archdiocese of Manfredonia-Vieste-S. Giovanni Rotondo Diocese of Cerignola-Ascoli Satriano Diocese of Lucera-Troia Diocese of San Severo
Ecclesiastical Province of Lecce Metropolitan Archdiocese of Lecce Archdiocese of Brindisi-Ostuni Archdiocese of Otranto Diocese of Nardò-Gallipoli Diocese of Ugento-Santa Maria di Leuca
Ecclesiastical Province of Taranto Metropolitan Archdiocese of Taranto Diocese of Castellaneta Diocese of Oria
Ecclesiastical Region of Sardinia Ecclesiastical Province of Cagliari Metropolitan Archdiocese of Cagliari Diocese of Iglesias Diocese of Lanusei Diocese of Nuoro
Ecclesiastical Province of Oristano Metropolitan Archdiocese of Oristano Diocese of Ales-Terralba
Ecclesiastical Province of Sassari Metropolitan Archdiocese of Sassari Diocese of Alghero-Bosa Diocese of Ozieri Diocese of Tempio-Ampurias
Ecclesiastical Region of Sicily Ecclesiastical Province of Agrigento Metropolitan Archdiocese of Agrigento Diocese of Caltanissetta Diocese of Piazza Armerina
Ecclesiastical Province of Catania Metropolitan Archdiocese of Catania Diocese of Acireale Diocese of Caltagirone
Ecclesiastical Province of Messina-Lipari-Santa Lucia del Mela Metropolitan Archdiocese of Messina-Lipari-Santa Lucia del Mela Diocese of Nicosia Diocese of Patti
Ecclesiastical Province of Palermo Metropolitan Archdiocese of Palermo Archdiocese of Monreale Diocese of Cefalu Diocese of Mazara del Vallo Diocese of Trapani
Ecclesiastical Province of Siracusa (Syracuse) Metropolitan Archdiocese of Siracusa Diocese of Noto Diocese of Ragusa
Ecclesiastical Region of Tuscany Ecclesiastical Province of Firenze (Florence)
Metropolitan Archdiocese of Florence Diocese of Arezzo-Cortona-Sansepolcro Diocese of Fiesole Diocese of Pistoia Diocese of Prato Diocese of San Miniato
Ecclesiastical Province of Pisa Archdiocese of Pisa Diocese of Livorno Diocese of Massa Carrara-Pontremoli Diocese of Pescia Diocese of Volterra
Ecclesiastical Province of Siena-Colle di Val d'Elsa-Montalcino Metropolitan Archdiocese of Siena-Colle di Val d'Elsa-Montalcino Diocese of Grosseto Diocese of Massa Marittima-Piombino Diocese of Montepulciano-Chiusi-Pienza Diocese of Pitigliano-Sovana-Orbetello
Ecclesiastical Region of Triveneto In the ecclesiastical region of Triveneto, there are two ecclesiastical provinces that are situated in the civil region of Friuli-Venezia Giulia (Gorizia and Udine); one province that is mainly situated in the civil region of Trentino-Alto Adige/Südtirol (Trento); and one province that is mainly situated in the civil region of Veneto (Venice).
Ecclesiastical Province of Gorizia Metropolitan Archdiocese of Gorizia Diocese of Trieste
Ecclesiastical Province of Udine Metropolitan Archdiocese of Udine
Ecclesiastical Province of Trento Metropolitan Archdiocese of Trento Diocese of Bolzano-Brixen
Ecclesiastical Province of Venice Patriarchate (& Metropolitan Archdiocese) of Venice Diocese of Adria-Rovigo Diocese of Belluno-Feltre Diocese of Chioggia Diocese of Concordia-Pordenone Diocese of Padua