List of Catholic dioceses (alphabetical)

This is a comprehensive list of Catholic dioceses worldwide, arranged alphabetically by their official Latin name. A diocese is a territorial division within the Catholic Church, headed by a bishop. It typically encompasses a number of parishes. This list includes dioceses of the Latin Church, as well as eparchies (dioceses) of the Eastern Catholic Churches which are in communion with the Pope.

Entries typically include the diocese name, its geographical location (e.g., city, region, or country), and the rite to which it belongs (Latin or Eastern). Often, the metropolitan archdiocese to which a diocese is suffragan will also be noted. For Eastern Catholic eparchies, the particular Church (e.g., Ukrainian Greek Catholic Church, Maronite Catholic Church) is often identified.

The information provided is subject to change, as dioceses may be erected, suppressed, or renamed. While efforts are made to keep this list current, discrepancies may exist. Consult official sources such as the Annuario Pontificio (the annual directory of the Holy See) or the website of the relevant episcopal conference for the most up-to-date and accurate information.

This list is intended as a reference tool and is not an endorsement of any particular political or religious viewpoint. Each diocese is a distinct entity with its own history, governance, and pastoral priorities. Further research into individual dioceses is encouraged for a more thorough understanding of the Catholic Church's presence and activities in various parts of the world.