Montréal-Ouest station is a commuter rail station in the Montreal borough of Notre-Dame-de-Grâce, adjacent to the border with the town of Montreal West, Quebec. It serves the Exo Vaudreuil-Hudson, Saint-Jérôme, and Candiac lines. Montréal-Ouest station is located in ARTM fare zone A, and has 20 parking spaces. It is the station where these three lines come together as one towards Lucien-L'Allier station.

Notre-Dame-de-Grâce, commonly known as NDG, is a residential neighbourhood of Montreal in the city's West End, with a population of 166,520 (2016). An independent municipality until annexed by the City of Montreal in 1910, NDG is today one half of the borough of Côte-des-Neiges–Notre-Dame-de-Grâce. It comprises two wards, Loyola to the west and Notre-Dame-de-Grâce to the east. NDG is bordered by four independent enclaves; its eastern border is shared with the City of Westmount, Quebec, to the north and west it is bordered by the cities of Montreal West, Hampstead and Côte-Saint-Luc. NDG plays a pivotal role in serving as the commercial and cultural hub for Montreal's predominantly English-speaking West End, with Sherbrooke Street West running the length of the community as the main commercial artery. The community is roughly bounded by Claremont Avenue to the east, Côte-Saint-Luc Road to the north, Brock Avenue in the west, and Highway 20 and the Saint-Jacques Escarpment to the south.