Westmount High School (French: École secondaire Westmount) is a public co-educational anglophone secondary school in Westmount, Quebec, Canada, located near the Alexis Nihon Complex Shopping Mall. It is a part of the English Montreal School Board (EMSB).

Westmount High is Quebec's first and only public school to offer Advanced Placement (AP) courses; it has offered an AP program since 2003. They offer AP Calculus, AP Comparative Government and Politics, AP English Literature and Composition, AP Environmental Science, AP French Language and Culture, and AP Psychology.

The school moved to its present location in 1961, after selling their former building to Selwyn House School.

Westmount is part of the English Montreal School Board and was formerly part of the Protestant School Board of Greater Montreal.

Despite being located in one of the wealthiest suburbs of Montreal, it's catchment area includes a diverse mix of students from all neighbourhoods and racial backgrounds. A long-time teacher at the school noted that most wealthy families would send their children to private schools, so the school received mostly students from disadvantaged backgrounds.

Around January 2020, Westmount High School created "The Westmount Highlights", a students and vice-principal YouTube channel initiative, to provide students with weekly school news, fun facts, and entertainment.