Catholic Dioceses
All Catholic dioceses and archdioceses
Last updated on: February 16, 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.
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The largest organizations
The largest organizations sorted by Members.
| # | Organisation (3039) | 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 | 3,329,045 | 2018 | ||
| 🇧🇷 19 | 3,320,334 | 2017 | ||
| 🇪🇸 20 | 3,316,800 | 2019 | ||
| 🇦🇴 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 |