Saint-Germain-en-Laye is the main railway station serving Saint-Germain-en-Laye, France. The station opened on 14 August 1847 with the opening of the Paris-St-Lazare–St-Germain-en-Laye railway, ligne de Saint Germain (from Paris to Saint-Germain), an atmospheric railway. It was the first railway line in the Île-de-France. Twelve years later, conventional locomotives replaced the atmospheric powered engines. The original station had a large veranda building above the terminating lines.

The Saint-Germain-en-Laye underground terminal station is located at the end of the Paris-Saint-Lazare to Saint-Germain-en-Laye line, after the Vésinet–Le Pecq station.

The line from Paris to Saint-Germain-en-Laye was the first railway line in the Île-de-France, completed in 1837. Due to the elevation of the plateau on which the town was built, the western terminus was built in the neighbouring town of Le Pecq, on the opposite bank of the Seine from Saint-Germain-en-Laye. It was closed ten years later, when a viaduct was built to cross the Seine and more powerful locomotives allowed trains to climb the slope leading to the Saint-Germain terrace. The Le Pecq station had a monumental building; it was abandoned, buried under new constructions, forgotten, and only exhumed during archaeological excavations in 2017.^[2][3]

The extension to theSaint-Germain-en-Laye station, on the rue de la Surintendance, was opened on August 14, 1847. It was a building with a rounded facade that provided access to the tracks located below the terrace of the Château de Saint-Germain-en-Laye.^[4] On November 30, 1882, a connecting track to the Grande Ceinture's Saint-Germain-en-Laye station was put into service. A plan for rebuilding the station, which was more than 60 years old and described as "inconvenient, cramped and smelly," was proposed by 1922, placing it underground like the stations on the Paris Metro.^[5]

• The station at the beginning of the 1900s
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  Front
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  View from above
• 
  Station and chateau

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In 1924 work began to modernize the station. The line was electrified in 1927, and the station work was complete by 1928.^[3]

48°53′53″N 2°05′42″E / 48.898°N 2.095°E / 48.898; 2.095