Tremblay is an O-Train station on the Confederation Line in Ottawa, Ontario which serves the Ottawa train station, connecting to Via Rail Corridor inter-city rail services and a daily Ontario Northland bus service to Sudbury and Sault Ste. Marie. The station opened on September 14, 2019 to replace the former Transitway bus rapid transit station known as Train Station.

The Confederation Line, also called O-Train Line 1, is a light rail line operated by OC Transpo in Ottawa, Ontario, Canada, as part of the city's O-Train light rail system. It opened on September 14, 2019, and is O-Train's second line. It operates on an east–west route, with a segment under Queen Street in the downtown core, complementing the north–south Trillium Line that operates to the west of the downtown core. Using light rail rolling stock and technology, the Confederation Line is completely grade separated.