The Porte Saint-Martin (French pronunciation: [pɔʁt sɛ̃ maʁtɛ̃], St. Martin Gate) is a Parisian monument located at the site of one of the gates of the now-destroyed fortifications of Paris.

It is located at the crossing of the Rue Saint-Martin, the Rue du Faubourg Saint-Martin and the grands boulevards Boulevard Saint-Martin and Boulevard Saint-Denis.

The Porte Saint-Martin was designed by architect Pierre Bullet (a student of François Blondel, architect of the nearby Porte Saint-Denis) at the order of Louis XIV in honor of his victories on the Rhine and in Franche-Comté.

The Porte Saint-Martin is a heavily rusticated triumphal arch, 18 meters high, built in limestone and marble.

This article about a French building or structure is a stub.