List of Catholic dioceses (alphabetical)

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This is a growing list of territorial dioceses and ordinariates in communion with the Holy See. There are approximately 3,000 actual (i.e., non-titular) dioceses in the Catholic Church (including the eparchies of the Eastern Catholic Churches).

• Those dioceses which are (metropolitan or nominal) archdioceses (including archeparchies) are marked in bold type and are also listed at List of Catholic archdioceses.
• Those dioceses which belong to Eastern Catholic Churches (often called "eparchies") are italicized and their particular Churches and proper episcopal titulature are specified after the see name.
• Missionary and other special types of circumscriptions (e.g., apostolic prefectures) are also specified before the country name.