The 4th arrondissement of Paris is one of the 20 arrondissements (administrative districts) of the capital city of France.

Situated on the Right Bank of the River Seine, it is bordered to the west by the 1st arrondissement; to the north by the 3rd, to the east by the 11th and 12th, and to the south by the Seine and the 5th.

The 4th arrondissement contains the Renaissance-era Paris City Hall. It also contains the Renaissance square of Place des Vosges, the overtly modern Pompidou Centre and the lively southern part of the medieval district of Le Marais, which today is known for being the gay district of Paris (while the more quiet northern part of Le Marais is contained inside the 3rd arrondissement). The eastern parts of the Île de la Cité (including Notre-Dame de Paris) as well as the Île Saint-Louis are also included within the 4th arrondissement.