Erected as the Diocese of Chilaw, separating from the Archdiocese of Colombo in 1939, which is suffragan to the Archdiocese of Colombo. This diocese was made out of the present diocese of Chilaw and the diocese of Kurunegala.
Ordinary
- Most Rev. Dr. Valence Mendis
Diocesan Director of Education
- Rev. Fr. Dhanushka Fernando
Notable Schools
| Name | Year | Location | Age |
|---|---|---|---|
| St. Andrew’s College | 1885 | Puttalam | 135 |
| Holy Family Convent | 1930 | Wennappuwa | 90 |
| St. Mary’s College | 1933 | Chilaw | 87 |
| St. Joseph Vaz College | 1934 | Wennappuwa | 86 |
| St. Xavier’s College | 1942 | Marawila | 78 |
| Carmel Girls’ College | 1943 | Chilaw | 77 |
Bishops
- Most Rev. Dr. Edmund Peiris OMI, Bishop of Chilaw from 1940- 1972
- Most Rev. Dr. Frank Marcus Fernando, Bishop of Chilaw from 1972 – 2006
- Most Rev. Dr. Valence Mendis, Bishop of Chilaw from 2006 –
