Thanks to Dave Landers for help with the transcription of the following parish histories from Rev. Thomas Donohue's 1929 History of the Diocese of Buffalo.
| No. | Parish | Date Formed | Nationality |
| 1. | All Saints' | 1911 | - |
| 2. | Annunciation | 1884 | - |
| 3. | Assumption | 1882 | Polish |
| 4. | Blessed Trinity | 1906 | - |
| 5. | Chapel of the Blessed Sacrament | 1889 | - |
| 6. | Christ the King | 1926 | - |
| 7. | Corpus Christi | 1896 | Polish |
| 8. | Holy Angels' | 1851 | - |
| 9. | Holy Apostles' | 1909 | Polish |
| 10. | Holy Cross | 1914 | Italian |
| 11. | Holy Family | 1902 | - |
| 12. | Holy Name | 1884 | - |
| 13. | Holy Spirit | 1913 | - |
| 14. | Immaculate Conception | 1839 | - |
| 15. | Most Holy Redeemer | 1913 | - |
| 16. | Nativity of the Blessed Virgin Mary | 1898 | - |
| 17. | Old Saint Patrick's | 1840 | Irish |
| 18. | Our Lady of Lourdes' | 1850 | French |
| 19. | Our Lady of Perpetual Help | 1897 | Irish |
| 20. | Precious Blood | 1898 | Polish |
| 21. | Queen of the Most Holy Rosary | 1916 | Polish |
| 22. | Queen of Peace | 1920 | Polish |
| 23. | Sacred Heart | 1875 | German |
| 24. | St. Adelbert's | - | Polish |
| 25. | St. Agatha's | 1909 | Italian |
| 26. | St. Agnes' | 1883 | German |
| 27. | St. Ann's | 1858 | German |
| 28. | St. Anthony of Padua' | 1891 | Italian |
| 29. | St. Augustine's | 1919 | - |
| 30. | St. Bartholomew's | 1912 | - |
| 31. | St. Bernard's | 1907 | - |
| 32. | St. Bonaventure's | 1917 | - |
| 33. | St. Boniface's | 1849 | - |
| 34. | St. Brigid's | 1853 | - |
| 35. | St. Casimir's | 1893 | Polish |
| 36. | St. Columba's | 1888 | - |
| 37. | St. Elizabeth's | 1906 | Hungarian |
| 38. | St. Florian's | 1917 | Polish |
| 39. | St. Francis of Assisi | - | - |
| 40. | St. Francis de Sales | - | - |
| 41. | St. Francis Xavier | - | - |
| 42. | St. Gerard's | - | - |
| 43. | St. James' | - | - |
| 44. | St. Joachim's | - | - |
| 45. | St. John the Baptist | - | - |
| 46. | St. John the Baptist | - | Ukranian |
| 47. | St. John the Evangelist | - | - |
| 48. | St. John Gualbert | - | Polish |
| 49. | St. John Kanty | - | Polish |
| 50. | St. John Maron | - | Syrian |
| 51. | St. Joseph's New Cathedral | - | - |
| 52. | St. Joseph's Old Cathedral | - | - |
| 53. | St. Joseph's | - | - |
| 54. | St. Louis' | 1832 | - |
| 55. | St. Lucy's | 1906 | Italian |
| 56. | St. Luke's | - | - |
| 57. | St. Margaret's | - | - |
| 58. | St. Mark's | - | - |
| 59. | St. Martin's | 1927 | - |
| 60. | St. Mary's | - | - |
| 61. | St. Mary Magdalene's | - | - |
| 62. | St. Mary of Sorrows | - | - |
| 63. | St. Matthew's | - | - |
| 64. | St. Michael's | - | - |
| 65. | St. Monica's | 1912 | - |
| 66. | St. Nicholas' | 1874 | - |
| 67. | St. Patrick's | 1853 | - |
| 68. | St. Rita's | 1920 | Slovak |
| 69. | St. Rose of Lima | 1925 | - |
| 70. | St. Stanislaus' | 1878 | Polish |
| 71. | St. Stephen's | 1875 | - |
| 72. | St. Teresa's | 1897 | - |
| 73. | St. Thomas Aquinas | 1920 | - |
| 74. | St. Valentine's | 1920 | Polish |
| 75. | St. Vincent's | 1864 | German |
| 76. | St. William's | 1925 | - |
| 77. | Transfiguration | 1893 | Polish |
| 78. | Visitation | 1898 | - |