Carleton is an O-Train light rail station located in the center of the Carleton University campus in Ottawa, Ontario. The station is served by Line 2, which began service in 2001, and is between Dow's Lake station to the north and Mooney's Bay station to the south. The line and station are currently under construction, and are expected to reopen in the summer of 2024.

Carleton was previously the only O-Train station along the Trillium Line with separate tracks and platforms for each direction, in order to allow the two trains working the otherwise (formerly) single-track line at any given time to pass. Since service upgrades in 2014-2015, and the ongoing O-Train South expansion project (Stage 2), more passing tracks have been added to the line. The station was upgraded in 2017 to accommodate the installations of fare gates and shelters parallel to the existing platforms, replacing the previous Proof-of-payment system.

South of the station, the line crosses over the Rideau River on a bridge, which was refurbished during Stage 2. As part of the Stage 2 South expansion, the southernmost pedestrian underpass linking Richcraft Hall and Pigiarvik was rehabilitated, and the main pedestrian underpass located between the station platforms and the Maintenance Building was demolished and replaced with a new structure double the length of the original. During Stage 2, a short tunnel was dug perpendicular to the platforms at their north end. Although it is currently not connected, in the near-to-medium-term future it will provide a direct, weather-protected connection between the station and the Carleton University tunnel system; likely to be connected to the Minto CASE in the building's later expansion. In the 2023 Campus Master Plan update and the 2019 Carleton University Transportation Strategy, the university included plans to build a bus loop or transit hub on the eastern side of the station, in the footprint of existing Parking Lot P4- and relocating all bus connections and bus–train transfers to that area. Pending approval by the City of Ottawa, Carleton plans to connect the transit hub directly to the northbound platform of the train station, providing an additional fare-paid access point for the community.

The following routes serve Carleton station as of April 4, 2024:

Key v t e
	O-Train
E1	Shuttle Express
R1   R2	O-Train replacement bus routes
98   39	Rapid routes
N75	Night routes
40   11	Frequent routes
55   162	Local routes
284	Connexion routes
405	300s: Shopper routes 400s: Event routes 600s: School routes
Additional info: Line 1: O-Train Confederation Line Route 2: Trillium Line (currently a bus route)   Routes 5 to 99: Custom routing that connects to Line 1 and/or Route 2 Routes 100 to 199: Custom routing that does not connect to Line 1 and/or Route 2 Routes 200 to 299: Connexion (peak-period only routes that connect to the O-Train) Routes 301 to 305: Shopper Routes (limited rural service) Routes 404 to 406: Canadian Tire Centre events Routes 450 to 456: Lansdowne Park events Routes 602 to 698: School Routes   Route R1: replaces Line 1 when out of service Route R2: alternative name for current Route 2 Routes N39 to N97: night service (replaces Line 1) White backgrounds: service may be limited   Last two digits represent service area: 00s and 10s – Central 20s – Gloucester 30s – Orléans 40s – Ottawa East 50s – Ottawa West 60s – Kanata, Stittsville 70s – Barrhaven 80s – Nepean 90s – South Keys

Carleton station service
O-Train	(To reopen in 2024)
A (Campus Ave.)	2   7   10   111
B (University Dr.)	2   7   10   111

• Will be the future terminus of Local Route 48, serving Alta Vista, connecting at Elmvale and terminating in the north at Hurdman station

• Carleton University
• Stadler FLIRT

Media related to Carleton Station at Wikimedia Commons

• Carleton O-Train station information
• Carleton area map with building of Carleton University Complex