La Défense station (French pronunciation: [la defɑ̃s]) is a station of the Transilien (Réseau Saint-Lazare) suburban rail lines, RER commuter rail network, Paris Métro, as well as a stop of the Île-de-France tram network. In the future, Paris Metro Line 15 of Grand Paris Express will pass through here, making it a huge railway hub. It is underneath the Grande Arche building in La Défense, the business district just west of Paris. The station is the western terminus of Métro Line 1 and connects the RER A line to the Métro Line 1 station since 1992, the Line 2 tramway since 1994 and SNCF (Transilien) train station. It is also attached to a major shopping centre. There are over 25 million entries and exits each year. A temporary special SNCF service began in April 1959 (1959-04) to serve the newly-built Centre of New Industries and Technologies (CNIT); the RER entered service on 19 January 1970 (1970-01-19). The RER E station built under the CNIT opened on 6 May 2024.

Highlights on the surface nearby include the monumental Grande Arche, skyscrapers that host the headquarters of important French and foreign companies, and works of urban art such as Le Pouce by César Baldaccini. From the central esplanade the Arc de Triomphe can be seen further down the Axe historique. Until May 2004, this part of La Défense hosted an information centre of the European Union managed by the European Parliament. Like the district it serves, the station takes its name from the 19th-century statue La Défense de Paris, commemorating the Franco-Prussian War.

• RER Line A and Line E
• Paris Métro Line 1
• Paris St Lazare Group III :
  • SNCF Gare Saint-Lazare – St Nom la Breteche–Forêt de Marly
  • SNCF Gare Saint-Lazare – Versailles Rive Droite
• SNCF La Défense – La Verrière
• Île-de-France tramway Line 2

There are four platforms in the Transilien station :

In the morning:

• Platforms 1 and 3 are used for PSL Group III lines to Paris
• Platform 2 is used for PSL Group III lines to Versailles Rive Droite / St Nom la Breteche – Forêt de Marly
• Platform 4 is used for La Défense – La Verrière line

In the afternoon:

• Platform 1 is used for PSL Group III lines to Paris
• Platforms 2 and 4 are used for PSL Group III lines to Versailles Rive Droite / St Nom la Breteche – Forêt de Marly
• Platform 3 is used for La Défense – La Verrière line

-0	Street level	Entrances/exits
-1	Platforms
-2	Mezzanine	to entrances/exits passageway to RER/Transilien lines
-3	Platform 1	← termination platform
	Side platform with PSDs, doors will open on the left
	Side platform with PSDs, doors will open on the left
	Platform 2	→ toward Château de Vincennes (Esplanade de La Défense) →
-4	Platform 1	→ toward Boissy-Saint-Léger or Marne-la-Vallée–Chessy (Charles de Gaulle–Étoile) →
	Island platform, doors will open on the left, right
	Platform A	→ toward Boissy-Saint-Léger or Marne-la-Vallée–Chessy (Charles de Gaulle–Étoile) →
	Platform B	← toward Saint Germain-en-Laye, Cergy-le-Haut or Poissy (Nanterre-Préfecture)
	Island platform, doors will open on the left, right
	Platform 2	← toward Saint Germain-en-Laye, Cergy-le-Haut or Poissy (Nanterre-Préfecture)
-5	Platform 1	→ toward Chelles–Gournay or Tournan (Neuilly–Porte Maillot) →
	Island platform, doors will open on the right
	Platform 2	← toward Nanterre–La Folie (Terminus)

• Note: The two side platforms for Metro Line 1 are located some distance apart, as opposed to one island platform.

• 
  RER A platforms
• 
  Transilien platforms
• 
  Paris Tramway Line 2 platform
• 
  MP 05 on Line 1
• 
  New automatic platform gates on eastbound platform

Buffet froid, the film, begins at La Défense station.

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

• Roland, Gérard (2003). Stations de métro. D’Abbesses à Wagram. Éditions Bonneton.

Media related to Gare de la Défense at Wikimedia Commons

• La Défense station at Transilien, the official website of SNCF (in French)
• La Défense station at "Gares & Connexions", the official website of SNCF (in French)