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| # | Catholics | Population | Percent Catholic | Province | Dioceses | Suffragans | Diocesan Priests | Religious Priests | Total Priests | Permanent Deacons | Male Religious | Female Religious | Parishes |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | 4,473,000 | 8,114,000 | 55.13% | Onitsha | 7 | Abakaliki, Awgu, Awka, Enugu, Nnewi, Nsukka | 1,072 | 117 | 1,189 | 454 | 1,181 | 490 | |
| 2 | 3,216,000 | 8,204,000 | 39.20% | Owerri | 6 | Aba, Ahiara, Okigwe, Orlu, Umuahia | 863 | 125 | 988 | 340 | 666 | 438 | |
| 3 | 2,543,000 | 12,522,000 | 20.31% | Abuja | 6 | Idah, Lafia, Lokoja, Makurdi, Otukpo | 313 | 56 | 369 | 4 | 270 | 351 | 172 |
| 4 | 2,181,000 | 8,617,000 | 25.31% | Lagos | 3 | Abeokuta, Ijebu-Ode | 112 | 121 | 233 | 153 | 188 | 95 | |
| 5 | 1,437,000 | 11,048,000 | 13.01% | Calabar | 5 | Ikot Ekpene, Ogoja, Port Harcourt, Uyo | 347 | 36 | 383 | 83 | 365 | 208 | |
| 6 | 990,000 | 18,795,000 | 5.27% | Jos | 5 | Bauchi, Jalingo, Maiduguri, Yola | 193 | 35 | 228 | 1 | 63 | 142 | 121 |
| 7 | 901,000 | 29,633,000 | 3.04% | Kaduna | 7 | Ilorin, Kafanchan, Kano, Minna, Sokoto, Zaria | 255 | 41 | 296 | 1 | 51 | 229 | 176 |
| 8 | 873,000 | 6,705,000 | 13.02% | Benin City | 4 | Auchi, Issele-Uku, Warri | 245 | 39 | 284 | 55 | 237 | 127 | |
| 9 | 816,000 | 13,734,000 | 5.94% | Ibadan | 5 | Ekiti, Ondo, Osogbo, Oyo | 180 | 106 | 286 | 447 | 327 | 172 |
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