| # | Current Name | Foundation Name | Year | Location | Diocese of Origin | Age | Religious Congregation |
|---|---|---|---|---|---|---|---|
| 1 | Holy Family Convent | 1845 | Jaffna | Ceylon | 175 | Holy Family Sisters | |
| 2 | St. Patrick’s College | Jaffna Catholic English School | 1850 | Jaffna | Jaffna | 170 | Brothers of St. Joseph |
| 3 | St. Anthony’s College | 1854 | Kandy | Colombo | 166 | Sylvestro-Benedictine Fathers | |
| 4 | St. Sebastian’s College | 1854 | Moratuwa | Colombo | 166 | De La Salle Brothers | |
| 5 | St. Xavier’s College | Parish School | 1859 | Nuwara Eliya | Colombo | 161 | Sylvestro-Benedictine Fathers |
| 6 | St. Mary’s College | 1864 | Trincomalee | Jaffna | 156 | Apostolic Carmel Sisters | |
| 7 | St. Benedict’s College | St. Benedict’s Institute | 1865 | Colombo | Colombo | 155 | De La Salle Brothers |
| 8 | St. Joseph’s College | 1867 | Trincomalee | Jaffna | 153 | Jesuits | |
| 9 | St. Anne’s College | 1867 | Kurunegala | Colombo | 153 | De La Salle Brothers | |
| 10 | St. Mary’s College | 1867 | Kegalle | Colombo | 153 | Jesuits | |
| 11 | Good Shepherd Convent | 1869 | Colombo | Colombo | 151 | Good Shepherd Sisters | |
| 12 | Holy Family Convent | 1870 | Kurunegala | Colombo | 150 | Holy Family Sisters | |
| 13 | St. Joseph’s College | 1870 | Grandpass | Colombo | 150 | De La Salle Brothers | |
| 14 | St. Xavier’s College | Good Shepherd School | 1870 | Mannar | Jaffna | 150 | De La Salle Brothers |
| 15 | St. Mary’s College | 1871 | Negombo | Jaffna | 149 | Marist Brothers | |
| 16 | St. Mary’s Boys’ English School | 1871 | Pettah | Colombo | 149 | De La Salle Brothers | |
| 17 | St. Anthony’s College | 1872 | Kayts | Jaffna | 148 | Brothers of St. Joseph | |
| 18 | St. Michael’s College | 1873 | Batticaloa | Jaffna | 147 | Jesuits | |
| 19 | St. Thomas’ College | 1873 | Matale | Colombo | 147 | Sylvestro-Benedictine Fathers | |
| 20 | St. Thomas’ Girls’ College | 1876 | Matale | Colombo | 144 | Good Shepherd Sisters | |
| 21 | St. Cecilia’s Girls’ College | 1876 | Batticaloa | Jaffna | 144 | Apostolic Carmel Sisters | |
| 22 | Swarnapali Balika Vidyalaya | 1876 | Anuradhapura | Jaffna | 144 | Holy Family Sisters | |
| 23 | St. Henry’s College | Roman Catholic Tamil Boys’chool | 1877 | Illawalai | Jaffna | 143 | Brothers of St. Joseph |
| 24 | St. Lucia’s College | 1880 | Kotahena | Colombo | 140 | De La Salle Brothers | |
| 25 | Davisamara Vidyalaya | 1884 | Seeduwa | Colombo | 136 | Diocesan Fathers | |
| 26 | St. Andrew’s College | 1885 | Puttalam | Colombo | 135 | De La Salle Brothers | |
| 27 | Our Lady of Victories Convent | 1886 | Moratuwa | Archdiocese | 134 | Franciscan Missionaries of Mary | |
| 28 | Good Shepherd Convent | 1889 | Kandy | Archdiocese | 131 | Good Shepherd Sisters | |
| 29 | Holy Cross College | 1890 | Kalutara | Archdiocese | 130 | Marist Brothers | |
| 30 | St. Aloysius’ College | 1895 | Galle | Galle | 125 | Jesuits | |
| 31 | St. Joseph’s College | 1896 | Colombo | Archdiocese | 124 | Diocesan Fathers | |
| 32 | Sacred Heart Convent | 1896 | Galle | Galle | 124 | Sisters of Charity | |
| 33 | St. Servatius’ College | 1897 | Matara | Galle | 123 | Jesuits | |
| 34 | St. Aloysius’ College | Sts. Peter & Paul College | 1898 | Ratnapura | Galle | 122 | Jesuits |
| 35 | St. Joseph’s College | 1898 | Anuradhapura | Jaffna | 122 | Oblates of Mary Immaculate | |
| 36 | St. Lawrence’s Convent | 1900 | Colombo | Archdiocese | 120 | Good Shepherd Sisters | |
| 37 | St. Bridget’s Convent | 1902 | Colombo | Archdiocese | 118 | Good Shepherd Sisters | |
| 38 | Holy Family Convent | 1903 | Colombo | Archdiocese | 117 | Holy Family Sisters | |
| 39 | St. Peter’s College | 1903 | Negombo | Archdiocese | 117 | Diocesan Fathers | |
| 40 | All Saints’ College | 1904 | Borella | Archdiocese | 116 | Apostolic Carmel Sisters | |
| 41 | De La Salle College | 1905 | Mutwal | Archdiocese | 115 | De La Salle Brothers | |
| 42 | Berrevaerts College | 1905 | Ampitiya | Kandy | 115 | Sylvestro-Benedictine Fathers | |
| 43 | Hemali Balika Vidyalaya | St. Scholastica’s Convent | 1907 | Kandy | Kandy | 113 | Good Shepherd Sisters |
| 44 | St. Joseph’s College | 1909 | Bandarawela | Kandy | 111 | Marist Brothers | |
| 45 | St. Mary’s College | St. Mary’s English Mixed School | 1909 | Dehiwela | Archdiocese | 111 | Diocesan Fathers |
| 46 | Holy Family Convent, Dehiwela | St. Mary’s English Mixed School | 1910 | Dehiwela | Archdiocese | 110 | Holy Family Sisters |
| 47 | St. Joseph’s Convent | St. Joseph’s Convent Girls’ English School | 1910 | Kegalle | Galle | 110 | Sisters of Charity |
| 48 | De Mazenod College | 1914 | Kandana | Archdiocese | 106 | De La Salle Brothers | |
| 49 | St. Anne’s Convent | 1920 | Wattala | Archdiocese | 100 | Good Shepherd Sisters | |
| 50 | Maris Stella College | 1922 | Negombo | Archdiocese | 98 | Marist Brothers | |
| 51 | St. Peter’s College | 1922 | Colombo | Archdiocese | 98 | Oblates of Mary Immaculate | |
| 52 | Infant Jesus Convent | 1924 | Ratnapura | Galle | 96 | Sisters of Charity | |
| 53 | Holy Cross College | 1924 | Gampaha | Archdiocese | 96 | Apostolic Carmel Sisters | |
| 54 | Little Flower Convent | 1927 | Bandarawela | Kandy | 93 | Apostolic Carmel Sisters | |
| 55 | St. Anthony’s Convent | 1927 | Mutwal | Archdiocese | 93 | Good Shepherd Sisters | |
| 56 | St. Sebastian’ Balika MV | 1928 | Kandana | Archdiocese | 92 | Good Shepherd Sisters | |
| 57 | Good Shepherd Convent | 1928 | Nayakakanda | Archdiocese | 92 | Good Shepherd Sisters | |
| 58 | St. Agnes’ Convent | 1930 | Balangoda | Trincomalee | 90 | Holy Angel Sisters | |
| 59 | Holy Family Convent | 1930 | Wennappuwa | Archdiocese | 90 | Holy Family Sisters | |
| 60 | Christ King College | 1930 | Pannipitiya | Archdiocese | 90 | Dominican Sisters of Phillipines | |
| 61 | St. Gabriel’s Convent | 1930 | Hatton | Kandy | 90 | Franciscan Missionaries of Mary | |
| 62 | St. Joseph Vaz College | 1934 | Wennappuwa | Archdiocese | 86 | Marist Brothers | |
| 63 | St. John Bosco College | 1934 | Hatton | Kandy | 86 | Brothers of St. Joseph | |
| 64 | St. Paul’s Balika Vidyalaya | 1935 | Kelaniya | Archdiocese | 85 | Apostolic Carmel Sisters | |
| 65 | Ave Maria Convent | 1938 | Negombo | Archdiocese | 82 | Good Shepherd Sisters | |
| 66 | St. John’s College | 1939 | Dematagoda | Archdiocese | 81 | Diocesan Fathers | |
| 67 | St. Sylvester’s College | 1940 | Kandy | Kandy | 80 | Sylvestro-Benedictine Fathers | |
| 68 | St. Anthony’s Balika MV | 1940 | Colpetty | Archdiocese | 80 | Apostolic Carmel Sisters | |
| 69 | St. Anthony’s College | 1942 | Wattala | Archdiocese | 78 | De La Salle Brothers | |
| 70 | Christ King College | 1943 | Tudella | Archdiocese | 77 | Marist Brothers | |
| 71 | Loyola College | 1949 | Negombo | Archdiocese | 71 | Diocesan Fathers | |
| 72 | St. Anthony’s Girls’ School | 1951 | Panadura | Archdiocese | 69 | Good Shepherd Sisters | |
| 73 | Good Shepherd Convent | 1953 | Panadura | Archdiocese | 67 | Good Shepherd Sisters | |
| 74 | St. Joseph’s College | 1953 | Nugegoda | Archdiocese | 67 | Marist Brothers |
