Haussmann–Saint-Lazare station (French pronunciation: [osman sɛ̃ lazaʁ]) is a station on the RER in Paris, France. Opened on 14 July 1999 as the terminus of the new Line E, it is situated beneath Boulevard Haussmann and directly connected to Gare Saint-Lazare, Auber, and two metro stations.

The architecture of Haussmann–Saint-Lazare closely resembles that of Magenta. Following the earlier model of Charles de Gaulle–Étoile, its main train hall houses two lines under a single cathedral-like vault with lateral platforms. As at Magenta, the hall is supplemented by an additional two "half-stations" on either side, each with one platform.

A "cathedral station", Haussmann–Saint-Lazare is remarkable for its relatively lavish proportions. A long term project to extend the Line E to the west, forming a new cross-Paris axis, was approved in February 2011.

The station's construction cost was €275 million.

Haussmann–Saint-Lazare forms part of a complex of connected underground stations (see below). Due to the scale of Auber in particular, this ensemble represents a notably large underground public space in terms of volume.

The station is served by the following service(s):

• Commuter services (RER E) from Nanterre–La Folie to Chelles–Gournay
• Commuter services (RER E) from Nanterre–La Folie to Tournan

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  RER E platforms at Haussmann–Saint-Lazare
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  RER E platforms at Haussmann–Saint-Lazare
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  Z 22500 rolling stock at Haussmann–Saint-Lazare
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  Z 50000 rolling stock at Haussmann–Saint-Lazare
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  Station interchange
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  Interconnecting corridor

• List of stations of the Paris RER
• List of stations of the Paris Métro

• Haussmann–Saint-Lazare station at Transilien, the official website of SNCF (in French)