Lorraine (French pronunciation: [lɔʁɛn] ⓘ) is an affluent off-island suburb of Montreal, in southwestern Quebec, Canada on the north shore of the Rivière des Mille-Îles in the Thérèse-De Blainville Regional County Municipality.

There are no industries and only a very limited commercial district (comprising one medical centre, one shopping mall, a golf course, a gym, a supermarket and arena); almost all houses are of the detached type.

Furthermore, a large portion of the town territory is set aside as wild forest (Forêt du Grand Côteau); some bike/ski trails run through it.

These two areas are also delimited by Quebec freeway A-640, and are only joined together by the main street (Boulevard de Gaulle) overpass.

This model residential community was founded as part of a federal program of the defunct Ministry of Urban Affairs, which encouraged the creation of “new towns”.

[10] In 2007 the town of Lorraine was recognized by the Canadian Society of Landscape Architects under the Awards of Excellence Program for 'La Promenade Riveraine Du Domaine Garth' project.