St. Louis Union Station

Coordinates38°37′45″N90°12′27″W / 38.62923°N 90.20763°W / 38.62923; -90.20763Built1892–94ArchitectTheodore LinkArchitectural styleRomanesque Revival, Richardsonian RomanesqueNRHP reference No.70000888Significant datesAdded to NRHPJune 15, 1970Designated NHLDecember 30, 1970

St. Louis Union Station is a former train station and National Historic Landmark in St. Louis, Missouri, United States. Opened in 1894, it was the largest station in the world with 31 tracks under an enclosed train shed. Passenger traffic peaked at 100,000 people a day in the 1940s. The last Amtrak passenger train left the station in 1978.

In the 1980s, it was renovated as a hotel, shopping center, and entertainment complex. The 2010s and 2020s saw more renovation and expansion of entertainment and office capacity. The hotel at the station, operated under the Curio brand, is a member of Historic Hotels of America, the official program of the National Trust for Historic Preservation.

An adjacent station serves the MetroLink light rail system, which has two lines that run under the station in the Union Station subway tunnel. The city's intercity terminal, the Gateway Transportation Center, sits 1⁄4 mile (400 m) to the south, serving MetroLink, Amtrak, and Greyhound Bus.