Catholic Dioceses
All Catholic dioceses and archdioceses
Last updated on: May 31, 2026
The Catholic Church is divided into dioceses worldwide. This list shows the largest dioceses by members of the Catholic Church and their growth or decline.
Attention: This data is a starting point for your research - and you can help improve it!
Do you see missing organizations or want to add data? For each organization, you'll find an edit icon that allows you to make changes directly in Wikidata. In our short guide, we'll show you how easy it is.
Would you like to regularly help with research or maintain this country page? We welcome volunteers and also offer internships. Just write to us – together we make civil society more visible.
The largest organizations
The largest organizations sorted by Members.
| # | Organisation (3040) | Members | Trend | Year |
|---|---|---|---|---|
| 🇨🇩 1 | 7,118,000 | 2019 | ||
| 🇲🇽 2 | 5,692,300 | 2019 | ||
| 🇲🇽 3 | 5,554,200 | 2019 | ||
| 🇮🇹 4 | 5,078,297 | 2019 | ||
| 🇧🇷 5 | 4,984,484 | 2017 | ||
| 🇲🇽 6 | 4,597,000 | 2019 | ||
| 🇬🇹 7 | 4,537,000 | 2017 | ||
| 🇵🇭 8 | 4,445,125 | 2019 | ||
| 🇻🇪 9 | 4,291,750 | 2019 | ||
| 🇨🇱 10 | 4,255,000 | 2017 | ||
| 🇲🇽 11 | 4,212,247 | 2019 | ||
| 🇺🇸 12 | 4,044,742 | 2019 | ||
| 🇨🇴 13 | 4,032,500 | 2018 | ||
| 🇰🇪 14 | 3,829,700 | 2019 | ||
| 🇵🇭 15 | 3,799,900 | 2019 | ||
| 🇳🇬 16 | 3,528,000 | 2019 | ||
| 🇩🇴 17 | 3,511,280 | 2017 | ||
| 🇪🇸 18 | 3,350,460 | 2023 | ||
| 🇵🇭 19 | 3,329,045 | 2018 | ||
| 🇧🇷 20 | 3,320,334 | 2017 | ||
| 🇦🇴 21 | 3,155,825 | 2019 | ||
| 🇵🇭 22 | 3,111,930 | 2019 | ||
| 🇧🇷 23 | 3,094,900 | 2019 | ||
| 🇵🇭 24 | 3,073,400 | 2019 | ||
| 🇵🇭 25 | 3,052,485 | 2017 | ||
| 🇭🇹 26 | 3,039,300 | 2019 | ||
| 🇸🇸 27 | 2,984,000 | 2017 | ||
| 🇪🇨 28 | 2,968,600 | 2019 | ||
| 🇵🇭 29 | 2,956,604 | 2019 | ||
| 🇨🇴 30 | 2,842,799 | 2019 | ||
| 🇦🇷 31 | 2,837,175 | 2018 | ||
| 🇺🇸 32 | 2,807,298 | 2019 | ||
| 🇲🇽 33 | 2,802,800 | 2019 | ||
| 🇨🇩 34 | 2,788,000 | 2019 | ||
| 🇲🇽 35 | 2,777,160 | 2019 | ||
| 🇧🇷 36 | 2,764,754 | 2019 | ||
| 🇵🇭 37 | 2,746,900 | 2019 | ||
| 🇪🇨 38 | 2,743,700 | 2020 | ||
| 🇪🇸 39 | 2,636,400 | 2017 | ||
| 🇨🇺 40 | 2,624,000 | 2017 | ||
| 🇮🇹 41 | 2,607,995 | 2019 | ||
| 🇧🇷 42 | 2,590,425 | 2017 | ||
| 🇵🇪 43 | 2,528,616 | 2019 | ||
| 🇵🇪 44 | 2,523,421 | 2019 | ||
| 🇧🇷 45 | 2,477,000 | 2017 | ||
| 🇧🇷 46 | 2,470,610 | 2017 | ||
| 🇲🇽 47 | 2,455,750 | 2017 | ||
| 🇨🇮 48 | 2,379,000 | 2018 | ||
| 🇨🇩 49 | 2,373,000 | 2019 | ||
| 🇻🇪 50 | 2,340,800 | 2019 |