| De Mazenod College | |
| Motto: | Latin: Animo-et-fide |
| Motto Translation: | Courageously and faithfully |
| Founder: | Rev Fr.Romould Fernando |
| Established: | 1931 |
| Type: | Government-aided private school |
| Grades: | 1–13 |
| Principal: | Janaka Fonseka |
| Gender: | Boys (Co-educational from grade 6) |
| Lower Age: | 6 |
| Upper Age: | 19 |
| Colours: | Blue,White and gold |
| Campus Size: | 3800 |
| Coordinates: | 7.05°N 133°W |
De Mazenod College (DMC), founded in 1931, is a Catholic school in Kandana, Sri Lanka, now managed by the De La Salle Brothers. De Mazenod College is a mixed school and has classes from grade 1 to grade 13. Classes are conducted in Sinhala as well as English. Girls are admitted to the school from grade 6 upwards.
On 12 October 1930, Colombo Archbishop Pierre-Guillaume Marque laid the foundation for a new building at the school's current location. In 1931, it was named to De Mazenod College, and in 1933, it came under the control of the De La Salle brothers. The first prize giving was held in 1937 under the patronage of the principal, Charles Louis, and was attended by Deputy Education Director W. R. Watson.
The first ever inter-house sports meet was held in 1938. The chief guest was S. W. R. D. Bandaranaike. The college houses at the time were De La Salle, Marque, and Romould.
An old boys' union with about 100 members was inaugurated in 1943, and Sinhala-language classes began in 1947
The students are divided into four houses:
Below is a list of notable alumni of De Mazenod College
| Name | Notability | Reference | |
|---|---|---|---|
| Actor, Playback Singer, politician (founder Sri Lanka Mahajana Pakshaya) | [1] | ||
| Rear Admiral (Rtd) Sri Lanka Navy-Former Commander Eastern Naval Area | [2] | ||
| singer, songwriter | [3] | ||
| obstetrician, gynaecologist | |||
| Deputy Chief of Staff of Sri Lanka Army (2017 - present) | [4] | ||
| international cricket player (2000 - 2012) | |||
| historian | |||
| Businessman | [5] | ||
| member of Parliament - Gampaha (1994–2013) | [6] [7] | ||
| dramatist | |||
| dramatist | [8] | ||
| international cricket player (2008 - 2015) | |||
| international cricket player (2016 - present) |