Montreal West is an on-island municipality in southwestern Quebec, Canada, on the Island of Montreal. Montreal West is a small, close-k…Montreal West is an on-island municipality in southwestern Quebec, Canada, on the Island of Montreal. Montreal West is a small, close-knit community made up primarily of single-family dwellings. The town is largely composed of families, with 77% of the population speaking English as their primary language at home, the highest percentage on the island.