Catholic Dioceses
in
The Holy See (Vatican City State)
by Type
by Name
by Ecclesiastical Province
Vacant
Former
Ecclesiastical Provinces
(1)
Type
Churches and Bishops
Roma
/
Rome
Papal See
Also covers
Vatican City State
.
Albano
Diocese
Seat in
Italy
, not covering Vatican City State.
Frascati
Diocese
Seat in
Italy
, not covering Vatican City State.
Ostia
Diocese
Seat in
Italy
, not covering Vatican City State.
The Cardinal Dean of the
College of Cardinals
has been the Bishop of
Ostia
since 1150. The Vicar General for the
Vicariate of Rome
has been the Apostolic Administrator of
Ostia
since 1966.11.18.
Palestrina
Diocese
Seat in
Italy
, not covering Vatican City State.
Porto–Santa Rufina
Diocese
Seat in
Italy
, not covering Vatican City State.
united
æque principaliter
with
Civitavecchia
1825.12.10–1854.06.14
Sabina–Poggio Mirteto
(–
Farfa
)
Diocese
Seat in
Italy
, not covering Vatican City State.
Velletri–Segni
Diocese
Seat in
Italy
, not covering Vatican City State.
United
æque principaliter
with
Segni
1981.10.20–1986.09.30
Last updated on 2025.01.23
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