Chicago Union Station

Chicago Union Station is an intercity and commuter rail terminal located in the West Loop neighborhood of the Near West Side of Chicago. The station is Amtrak's flagship station in the Midwest. While serving long-distance passenger trains, it is also the downtown terminus for six Metra commuter lines. Union Station is just west of the Chicago River between West Adams Street and West Jackson Boulevard, adjacent to the Chicago Loop. Including approach and storage tracks, it covers about nine and a half city blocks.

The present station opened in 1925, replacing an earlier union station on this site built in 1881. The station is the fourth-busiest rail station in the United States, after Pennsylvania Station, Grand Central Terminal, and Jamaica station in New York City, and the busiest outside of the Northeast Corridor. It handles about 140,000 passengers on an average weekday.