The following is the List of the Catholic dioceses in Italy. As of May 2017[update], 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.
In Rome, there is also an Apostolic Nunciature (papal diplomatic representation at ambassador-level) to the Republic of Italy and two permanent representatives to the Food and Agricultural Organization of the United Nations (FAO) and to the International Institute for the Unification of Private Law (UNIDROIT).
Episcopal Conference of Italy
|L'Aquila in Abruzzo|
|Chieti-Vasto in Abruzzo|
|Pescara-Penne in Abruzzo|
|Campobasso-Boiano in Molise|
|Potenza-Muro Lucano-Marsico Nuovo|
|Turin including Aosta Valley|
|Vercelli in Piedmont|
|Siena-Colle di Val d'Elsa-Montalcino|
|Gorizia in Friuli-Venezia Giulia|
|Udine in Friuli-Venezia Giulia|
|Trento in Trentino-Alto Adige/Südtirol|
|Venice in Veneto|
|Perugia-Città della Pieve|
Exempt, i.e. immediately Subject to the Holy See, yet not in the Pope's Ecclesiastical Province of Rome
- For a complete list, see List of Catholic dioceses (structured view) § Episcopal Conference of Italy, including San Marino and Vatican City State
- 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
(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
Ecclesiastical Province of L'Aquila
Ecclesiastical Province of Chieti-Vasto
Ecclesiastical Province of Pescara-Penne
Ecclesiastical Province of Campobasso-Boiano
- Metropolitan Archdiocese of Campobasso-Boiano
Ecclesiastical Region of Triveneto
In the ecclesiastical region of Triveneto, there are two ecclesiastical provinces of 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); one province that is mainly situated in the civil region of Veneto (Venice).
Ecclesiastical Province of Gorizia
Ecclesiastical Province of Udine
- Metropolitan Archdiocese of Udine
Ecclesiastical Province of Trento
Ecclesiastical Province of Venice
- Patriarchate (& Metropolitan Archdiocese) of Venice
Ecclesiastical Region of Sardinia
Ecclesiastical Province of Cagliari
Ecclesiastical Province of Oristano
Ecclesiastical Province of Sassari
- Metropolitan Archdiocese of Sassari
Ecclesiastical Region of Sicily
Ecclesiastical Province of Agrigento
Ecclesiastical Province of Catania
Ecclesiastical Province of Messina-Lipari-Santa Lucia del Mela
Ecclesiastical Province of Palermo
- Metropolitan Archdiocese of Palermo
Ecclesiastical Province of Siracusa (Syracuse)
Ecclesiastical Province of Ancona-Osimo
- Metropolitan Archdiocese of Ancona-Osimo
Ecclesiastical Province of Bari-Bitonto
- Metropolitan Archdiocese of Bari-Bitonto
Ecclesiastical Province of Benevento
- Metropolitan Archdiocese of Benevento
Ecclesiastical Province of Bologna
- Metropolitan Archdiocese of Bologna
Ecclesiastical Province of Catanzaro-Squillace
- Metropolitan Archdiocese of Catanzaro-Squillace
Ecclesiastical Province of Cosenza-Bisignano
- Metropolitan Archdiocese of Cosenza-Bisignano
Ecclesiastical Province of Fermo
- Metropolitan Archdiocese of Fermo
Ecclesiastical Province of Firenze (Florence)
- Metropolitan Archdiocese of Florence
Ecclesiastical Province of Foggia-Bovino
- Metropolitan Archdiocese of Foggia-Bovino
Ecclesiastical Province of Genoa
- Metropolitan Archdiocese of Genoa
Ecclesiastical Province of Lecce
- Metropolitan Archdiocese of Lecce
Ecclesiastical Province of Milan
- Metropolitan Archdiocese of Milan
Ecclesiastical Province of Modena-Nonantola
- Metropolitan Archdiocese of Modena-Nonantola
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 Province of Perugia-Città della Pieve
- Metropolitan Archdiocese of Perugia-Città della Pieve
Ecclesiastical Province of Pesaro
- Metropolitan Archdiocese of Pesaro
Ecclesiastical Province of Pisa
- Archdiocese of Pisa
Ecclesiastical Province of Potenza-Muro Lucano-Marsico Nuovo
- Archdiocese of Potenza-Muro Lucano-Marsico Nuovo
Ecclesiastical Province of Ravenna-Cervia
- Archdiocese of Ravenna-Cervia
Ecclesiastical Province of Reggio Calabria-Bova
- Archdiocese of Reggio Calabria-Bova
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 Province of Salerno-Campagna-Acerno
- Metropolitan Archdiocese of Salerno-Campagna-Acerno
Ecclesiastical Province of Siena-Colle di Val d'Elsa-Montalcino
- Metropolitan Archdiocese of Siena-Colle di Val d'Elsa-Montalcino
Ecclesiastical Province of Taranto
Ecclesiastical Province of Turin
- Metropolitan Archdiocese of Turin
Ecclesiastical Province of Vercelli
- Metropolitan Archdiocese of Vercelli
- Titular Archiepiscopal Sees :
- Titular Episcopal Sees (158, TO BE WIKIFIED): Acquapendente, Æca, Agropoli, Alessano, Altino, Amiterno, Anglona, Anzio, Aquaviva, Arna, Arpi, Asolo, Atella, Aveia, Bagnoregio, Belcastro, Bettona, Bevagna, Biccari, Bisarcio, Bitetto, Blanda, Blera, Bolsena, Bomarzo, Brescello, Buxentum, Campli, Canne, Canosa, Caorle, Capo della Foresta, Capri, Carini, Carinola, Carmeiano, Castello, Castro, Castro di Puglia, Castro di Sardegna, Caudium, Celano, Cerenzia, Cerveteri, Città Ducale, Civitanova, Civitate, Claterna, Cuma, Dolia, Dragonara, Eclano, Egnazia Appula, Equilio, Eraclea, Erdonia, Faleri, Falerone, Ferento, Fidene, Fiorentino, Fondi, Forconio, Fordongianus, Forlimpopoli, Formia, Foro Flaminio, Frigento, Gabi, Galazia in Campania, Gallese, Galtellì, Grumentum, Guardialfiera, Isola, Labico, Lavello, Lentini, Lesina, Lettere, Lilibeo, Lorium, Luni, Malamocco, Martana, Martirano, Massa Lubrense, Minervino Murge, Minori, Minturno, Miseno, Montecorvino, Montefiascone, Montemarano, Monterano, Monteverde, Mottola, Nepi, Nomento, Numana, Oderzo, Ofena, Orte, Ostra, Otricoli, Ottana, Passo Corese, Pausula, Pesto, Plestia, Ploaghe, Polignano, Populonia, Potenza Picena, Ravello, Roselle, Sabiona, Sala Consilina, Salpi, San Leone, Santa Giusta, Satriano, Scala, Sepino, Sorres, Spello, Strongoli, Subaugusta, Suelli, Sulci, Sutri, Taormina, Tauriano, Termini Imerese, Tharros, Thurio, Tindari, Torcello, Tortiboli, Tre Taverne, Treba, Trevi, Trevi nel Lazio, Trevico, Tricala, Troina, Tronto, Tuscania, Umbriatico, Urbisaglia, Velia, Vescovìo, Vibo Valentia, Vico Equense, Voghenza, Volturno, Vulturara, Zuglio
- Titular Abbacies (?nullius) (all 10 united to current dioceses) : Farfa, Fontevivo, Nonantola, Pomposa, San Colombano, San Martino al Monte Cimino, San Michele Arcangelo di Montescaglioso, San Salvatore Maggiore, Santa Maria di Polsi, Santissimo Salvatore
Gallery of Archdioceses
The seat of the Archdiocese of Agrigento is Cattedrale Metropolitana di San Gerlando.
The seat of the Archdiocese of Ancona-Osimo is Basilica Cattedrale Metropolitana di San Ciriaco.
The co-seat of the Archdiocese of Ancona-Osimo is Basilica Concattedrale di S. Leopardo.
The seat of the Archdiocese of Bari-Bitonto is Cattedrale di San Sabino.
The co-seat of the Archdiocese of Bari-Bitonto is Cattedrale di San Valentino.
The seat of the Archdiocese of Benevento is Cattedrale di Santa Maria Assunta.
The seat of the Archdiocese of Bologna is Cattedrale Metropolitana di San Pietro.
The seat of the Archdiocese of Cagliari is Cattedrale di Santa Maria e Santa Cecilia.
The seat of the Archdiocese of Catania is Cattedrale di Sant'Agata.
The seat of the Archdiocese of Florence is Basilica di Santa Maria del Fiore.
The seat of the Archdiocese of Genoa is Cattedrale di San Lorenzo.
The seat of the Archdiocese of Lucca is Cattedrale di S. Martino.
The seat of the Archdiocese of Milan is Cattedrale di S. Maria Nascente.
The seat of the Archdiocese of Naples is Cattedrale di Santa Maria Assunta.
The seat of the Archdiocese of Oristano is Cattedrale di S. Maria Assunta.
The seat of the Archdiocese of Palermo is Cattedrale di l’Assunzione di Maria.
The seat of the Archdiocese of Pisa is Cattedrale di S. Maria Assunta.
The seat of the Diocese of Rome is Archbasilica of St. John Lateran
The seat of the Archdiocese of Sassari is Cattedrale di S. Nicola di Bari.
The seat of the Archdiocese of Salerno-Campagna-Acerno is Cattedrale-Basilica di S. Matteo.
The co-seat of the Archdiocese of Salerno-Campagna-Acerno is Concattedrale di S. Donato(Acerno).
The seat of the Archdiocese of Siena-Colle di Val d'Elsa-Montalcino is Cattedrale di S. Maria Assunta.
The co-seat of the Archdiocese of Siena-Colle di Val d'Elsa-Montalcino is the Cathedral of Ss. Marziale & Alberto.
The co-seat of the Archdiocese of Siena-Colle di Val d'Elsa-Montalcino is Concattedrale di S. Salvatore(Montalcino).
The seat of the Archdiocese of Siracusa is the Cathedral of the Nativity of Mary Most Holy.
The seat of the Archdiocese of Spoleto-Norcia is Cattedrale di Santa Maria Assunta.
The seat of the Archdiocese of Turin is Cattedrale Metropolitana di S. Giovanni Battista.
The seat of the Archdiocese of Trento is Basilica Cattedrale di S. Vigilio Vescovo.
The seat of the Archdiocese of Venice is Basilica Cattedrale Patriachale di S. Marco.
The seat of the Archdiocese of Vercelli is Cattedrale-Basilica di S. Eusebio.