The Link light rail system serves the Seattle metropolitan area in the U.S. state of Washington and is operated by Sound Transit. It consists of 50 stations on three light rail lines in King, Pierce, and Snohomish counties: the 1 Line from Lynnwood to Federal Way; the 2 Line from Lynnwood to Redmond; and the T Line in Tacoma.
The first Link segment began service on August 23, 2003, with the opening of five stations on the Tacoma Link (now the T Line). The initial, segment of Central Link (now the 1 Line) with 12 stations was opened from Seattle to Tukwila on July 18, 2009, and was later extended to the SeattleâÂÂTacoma International Airport on December 19, 2009. The first infill station of the Link system was Commerce Street/South 11th Street station on the T Line, which opened on September 15, 2011. The 1 Line was extended north to the University of Washington on March 19, 2016, and south to Angle Lake station on September 24, 2016. A northern extension to Northgate station with three stations opened on October 2, 2021. The T Line was extended in September 2023 with six new stations and one relocated stop. The first section of the 2 Line opened on April 27, 2024, with eight stations in Bellevue and Redmond. Four stations were added to the 1 Line on August 30, 2024, as it was extended to Lynnwood. Three more stations were added to the 1 Line on December 6, 2025, extending the line South to Federal Way. Two more stations opened on the 2 Line on March 28, 2026, connecting that line to the 1 Line across Lake Washington. An infill station at Pinehurst is scheduled to open in 2026.
Further expansions approved by Sound Transit 3 in 2016 are planned to expand the light rail network by and 39 stations to a total of of track and 83 stations by 2044, carrying 500,000 daily passengers. The light rail network will include lines to Ballard and West Seattle in Seattle in 2039 and 2032, respectively; Kirkland and Issaquah on the Eastside in 2044; and extensions to Everett and Tacoma in 2041 and 2032, respectively. Three infill stations in Seattle and Tukwila will also be built as part of the Sound Transit 3 program.
All 1 Line and 2 Line stations are built with , platforms, arranged in the center or sides of the two tracks, with capacity to handle a four-car train with vehicles; T Line stations are built with , platforms that can accommodate a one-car train measuring in length. The majority of stations are built at-grade on the surface, with the platform elevated slightly above street level; there are also elevated stations and underground stations that include mezzanines (with the exception of Mount Baker station) with access the platform from the surface as well as ticket vending machines and bicycle facilities. Only four current stations (Angle Lake, Northgate, Tacoma Dome Station, and Tukwila International Boulevard) have public park and rides; planned stations on the suburban extensions of Link will incorporate new or existing park and rides.
All stations include works of public art as part of the "STart" program, which requires one percent of station construction funds go to art installations. The stations are named in accordance to facility naming guidelines that include using surrounding neighborhoods and street names, avoiding words used by existing facility names, and being limited to 30 characters in compliance with the Americans with Disabilities Act. Stations are also required by state law to be identified by simple pictograms, known as "Stellar Connections", that are used in station signage, maps and other printed materials as a wayfinding aid; the icons are composed of points that correspond with local landmarks near Link stations, while also forming a picture that represents the station's identity.
, Sound Transit currently has one light rail project under construction, an infill station at Pinehurst.
The Sound Transit 3 program, approved by voters in 2016, will expand the Link light rail network to over and 70 stations when completed in 2044.