The 12th arrondissement of Paris (also known as "arrondissement de Reuilly") is one of the 20 arrondissements (administrative districts) of the capital city of France.

Situated on the right bank of the River Seine, the district has been significantly reorganized in recent decades, especially in the areas of Cour Saint-Émilion and Bercy, which now contain the French Ministry of Finances and the Bercy arena.

The 12th arrondissement contains the Opéra de la Bastille, the second largest opera house in Paris. It was inaugurated in 1989, on the 200th anniversary of the storming of the Bastille. The Bois de Vincennes is also located in this arrondissement.