The West Toronto Diamond is a railway junction in Toronto, Ontario, Canada. It connects the Metrolinx Weston Subdivision, which carries the GO Transit Kitchener line, UP Express and Via Rail Corridor passenger services, to the CPKC North Toronto Subdivision, which is the Canadian Pacific Kansas City's main freight line across Toronto. It is located near the intersection of Keele Street and Dundas Street in Toronto.

Kitchener is one of the seven train lines of the GO Transit system in the Greater Toronto Area, Ontario, Canada. It extends westward from Union Station in Toronto to Kitchener, though most trains originate and terminate in Brampton in off-peak hours.