| Numbers | ||||
|---|---|---|---|---|
| Diocese | Church of Ireland (Anglican) | Roman Catholic | Presbyterian | Other Protestants |
| Armagh | 103,012 | 309,447 | 84,837 | 3,340 |
| Clogher | 104,359 | 260,241 | 34,623 | 26 |
| Derry | 50,350 | 196,614 | 118,339 | 1,738 |
| Down | 27,662 | 58,405 | 98,961 | 3,530 |
| Connor | 66,888 | 95,545 | 193,261 | 5,924 |
| Dromore | 41,737 | 76,275 | 69,264 | 933 |
| Kilmore | 46,879 | 240,593 | 8,736 | 97 |
| Meath | 25,626 | 377,562 | 672 | 199 |
| Raphoe | 33,507 | 145,385 | 28,914 | 24 |
| Total Province of Armagh | 500,020 | 1,760,067 | 637,607 | 15,811 |
| * | * | * | * | |
| Dublin | 106,599 | 391,006 | 2,290 | 2,082 |
| Kildare | 13,907 | 120,056 | 9 | 384 |
| Ferns | 24,672 | 172,789 | 19 | 300 |
| Leighlin | 20,391 | 169,982 | 191 | 288 |
| Ossory | 12,361 | 209,848 | 8 | 108 |
| Total Province of Dublin | 177,930 | 1,063,681 | 2,517 | 3,162 |
| * | * | * | * | |
| Cashel | 6,187 | 196,256 | 62 | 26 |
| Emly | 1,246 | 97,115 | 1 | 1 |
| Cloyne | 13,866 | 328,402 | 14 | 195 |
| Cork | 35,220 | 303,984 | 510 | 871 |
| Ross | 5,988 | 102,308 | - | 2 |
| Killaloe | 19,149 | 359,585 | 16 | 326 |
| Kilfenora | 235 | 36,166 | 4 | - |
| Limerick | 11,122 | 246,302 | 85 | 191 |
| Ardfert and Aghadoe | 7,529 | 297,131 | - | 27 |
| Waterford | 5,301 | 43,371 | 110 | 433 |
| Lismore | 5,970 | 209,720 | 164 | 382 |
| Total Province of Cashel | 111,813 | 2,220,340 | 966 | 2,454 |
| * | * | * | * | |
| Tuam | 9,619 | 467,970 | 367 | 65 |
| Ardagh | 17,702 | 195,056 | 466 | 12 |
| Clonfert | 4,761 | 119,082 | 2 | 3 |
| Kilmacduagh | 656 | 45,476 | - | - |
| Elphin | 16,417 | 310,822 | 250 | 135 |
| Killala | 7,729 | 136,383 | 38 | 139 |
| Achonry | 5,417 | 108,835 | 143 | 27 |
| Total Province of Tuam | 62,301 | 1,383,624 | 1,266 | 381 |
| * | * | * | * | |
| Ireland | 852,064 | 6,427,712 | 642,356 | 21,808 |
| * | * | * | * | |
| * | * | * | * | |
| Percentage | ||||
| Diocese | Church of Ireland (Anglican) | Roman Catholic | Presbyterian | Other Protestants |
| Armagh | 20.6% | 61.8% | 16.9% | 0.7% |
| Clogher | 26.1% | 65.2% | 8.7% | 0.0% |
| Derry | 13.7% | 53.6% | 32.2% | 0.5% |
| Down | 14.7% | 31.0% | 52.5% | 1.9% |
| Connor | 18.5% | 26.4% | 53.4% | 1.6% |
| Dromore | 22.2% | 40.5% | 36.8% | 0.5% |
| Kilmore | 15.8% | 81.2% | 2.9% | 0.0% |
| Meath | 6.3% | 93.4% | 0.2% | 0.0% |
| Raphoe | 16.1% | 70.0% | 13.9% | 0.0% |
| Total Province of Armagh | 17.2% | 60.4% | 21.9% | 0.5% |
| * | * | * | * | |
| Dublin | 21.2% | 77.9% | 0.5% | 0.4% |
| Kildare | 10.4% | 89.4% | 0.0% | 0.3% |
| Ferns | 12.5% | 87.4% | 0.0% | 0.2% |
| Leighlin | 10.7% | 89.1% | 0.1% | 0.2% |
| Ossory | 5.6% | 94.4% | 0.0% | 0.0% |
| Total Province of Dublin | 14.3% | 85.3% | 0.2% | 0.3% |
| * | * | * | * | |
| Cashel | 3.1% | 96.9% | 0.0% | 0.0% |
| Emly | 1.3% | 98.7% | 0.0% | 0.0% |
| Cloyne | 4.0% | 95.9% | 0.0% | 0.1% |
| Cork | 10.3% | 89.3% | 0.1% | 0.3% |
| Ross | 5.5% | 94.5% | 0.0% | 0.0% |
| Killaloe | 5.1% | 94.9% | 0.0% | 0.1% |
| Kilfenora | 0.6% | 99.3% | 0.0% | 0.0% |
| Limerick | 4.3% | 95.6% | 0.0% | 0.1% |
| Ardfert and Aghadoe | 2.5% | 97.5% | 0.0% | 0.0% |
| Waterford | 10.8% | 88.1% | 0.2% | 0.9% |
| Lismore | 2.8% | 97.0% | 0.1% | 0.2% |
| Total Province of Cashel | 4.8% | 95.1% | 0.0% | 0.1% |
| * | * | * | * | |
| Tuam | 2.0% | 97.9% | 0.1% | 0.0% |
| Ardagh | 8.3% | 91.5% | 0.2% | 0.0% |
| Clonfert | 3.8% | 96.2% | 0.0% | 0.0% |
| Kilmacduagh | 1.4% | 98.6% | 0.0% | 0.0% |
| Elphin | 5.0% | 94.9% | 0.1% | 0.0% |
| Killala | 5.4% | 94.5% | 0.0% | 0.1% |
| Achonry | 4.7% | 95.1% | 0.1% | 0.0% |
| Total Province of Tuam | 4.3% | 95.6% | 0.1% | 0.0% |
| * | * | * | * | |
| Ireland | 10.7% | 80.9% | 8.1% | 0.3% |