St. Mary's College (CIC, which stands for College of the Immaculate Conception) is a government-assisted selective Catholic secondary school located in Port of Spain, Trinidad and Tobago.
Notable alumni
- Ellis Achong, West Indies Test cricketer
- Emmanuel Amoroso, reproductive physiologist and developmental biologist
- Eugene Chen (1878–1944), Trinidadian-Chinese politician and foreign minister of Republic of China
- Ellis Clarke, first President of Trinidad and Tobago.
- Diego Cisneros, businessman
- Joshua Da Silva, West Indies Test cricketer
- Leslie Fitzpatrick, soccer player
- Angus Fraser (clergyman and teacher), founder of the Via Christi Society
- Wayne A.I. Frederick, President of Howard University
- Ken Gordon, businessman
- Shaka Hislop, football player
- Jillionaire, DJ and music producer
- John La Rose, publisher and cultural activist
- Clement Ligoure, physician and publisher
- Michael Mooleedhar, filmmaker
- Quintin O'Connor, union leader
- George Padmore (1903–1959), pan-Africanist, author
- Joseph Lennox Pawan, MBE, Trinidadian bacteriologist
- Clifford Roach, West Indies Test cricketer
- Harry Schachter, Canadian biochemist
- Stuart Young, Former Prime Minister of Trinidad and Tobago