|This article has multiple issues. Please help improve it or discuss these issues on the talk page.
- For the high school called "Westmount" in Thornhill, Ontario, Canada, see Westmount Collegiate Institute.
Westmount High School is a public secondary school located at 4350 St. Catherine St. West in Westmount, Quebec, Canada.
- Jesse Camacho, actor
- John E. Cleghorn, banker, chancellor of Wilfrid Laurier University
- Leonard Cohen, poet, musician, writer
- Stockwell Day, Canadian politician (provincial and federal), former leader of the Canadian Alliance (now defunct)
- Jeffrey Khaner, Principal Flutist, Philadelphia Orchestra, Flute Professor Juilliard School and Curtis Institute
- Mary Jane Lamond, folk musician
- David H. Levy, astronomer, discoverer of 22 comets
- Mila Mulroney, wife of ex-prime minister Brian Mulroney
- Alfred Powis, businessman
- Moshe Safdie, class of '55, architect (famous for Montreal's Expo 67's "Habitat 67" apartment complex)
- Edgar William Richard Steacie, scientist
- Gordon Wasserman, class of '55 Rhodes Scholar Oxford University, appointed member of the UK House of Lords, 2011