King County Metro

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King County Metro, officially the King County Metro Transit Department and often shortened to Metro, is the public transit authority of King County, Washington, which includes the city of Seattle. It is the eighth-largest transit bus agency in the United States. In 2025, the system had a ridership of 94,481,800, or about 307,600 per weekday as of the second quarter of 2026. Metro employs 2,428 full-time and part-time operators and operates a fleet of 1,089 buses. The agency has 131 routes, including several dial-a-ride services; a paratransit system; and a large vanpool network. The agency was founded as the Municipality of Metropolitan Seattle in 1958 to coordinate wastewater treatment in King County and was reorganized into a county transit agency on January 1, 1973. Metro took over operations from the Seattle Transit System, founded in 1939, and Overlake Transit Service, a private operator founded in 1927 to serve the Eastside. It was a separate government agency until it was merged...

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