Lyon is an underground light rail station on the Confederation Line of the O-Train in Ottawa located in the western portion of Ottawa's downtown, specifically at Lyon Street and Queen Street, the latter being the street the line runs under within Ottawa's downtown core.

This O-Train station opened on September 14, 2019. It is located at the Lyon Street North and Queen Street intersection, between Bay Street and Kent Street, which formerly served as Transitway bus stops on Albert Street and Slater Street. This stop is projected to have high usage, with access to Sparks Street, the Supreme Court, and the National Archives of Canada.

The station is an underground side platform station; the platforms are located 17.5 metres underground. A concourse above platform level has ticket barriers on either end, giving access to the Lyon Street (east) and Place de Ville (west) accesses.

An entrance is integrated into the Place de Ville complex, giving indoor access to a mid-rise office building, three office towers and two major hotels.

The station features two artworks: With Words as their Actions by PLANT Architect, led by Lisa Rapoport, a metal sculpture at concourse level, and This Image Relies on Positive Thinking by Geoff McFetridge, a series of murals of human figures located in the accesses.

From July 16 to September 14, 2017, the underground light and music show Kontinuum was held in the not-yet-opened station as part of the Canada 150 celebrations.

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

The following routes serve Lyon station as of October 6 2019:

Stop	Routes
East O-Train
West O-Train
A Lyon St. South	R1   10   15   16   N57   N61   N75
B Queen St. East	R1   16   N57   N61   N75
C Lyon St. North	15