Westmount is an affluent municipality on the Island of Montreal, in southwestern Quebec, Canada. It is an enclave of the city of Montrea…Westmount is an affluent municipality on the Island of Montreal, in southwestern Quebec, Canada. It is an enclave of the city of Montreal, with a population of 19,658 as of the 2021 Canadian census. Westmount is home to schools, an arena, a pool, a public library and a number of parks, including Westmount Park, King George Park and Westmount Summit. The city operates its own electricity distribution company Westmount Light & Power. The city is also the location of two Canadian Forces Primary Reserve units: The Royal Montreal Regiment and 34th Signals Regiment.