Lucien-L'Allier station (French pronunciation: [lysjɛ̃ lalje]) is a commuter rail terminal in Montreal, Quebec, Canada.

This station is in turn named for rue Lucien-L'Allier, the original name of which, rue de l'Aqueduc, was changed in order to commemorate Lucien L'Allier, chief engineer for the initial network of the Montreal Metro and for the construction of Saint Helen's Island and Île Notre-Dame for Expo 67.

Originally called Terminus Windsor, this new terminal was renamed Gare Lucien-L'Allier to reduce confusion with the original Windsor Station, which still exists but is no longer a railway station.

On 12 February 2024, Exo announced that this station would be closed starting 1 April 2024 for repair works to bring it up to modern standards.

Terminus Lucien-L'Allier is the eastern end of the Canadian Pacific Railway's Westmount Subdivision.