The Place Denfert-Rochereau (French pronunciation: [plas dɑ̃fɛʁ ʁɔʃʁo]), previously known as the Place d'Enfer, is a public square located in the 14th arrondissement of Paris, France, in the Montparnasse district, at the intersection of the boulevards Raspail, Arago, and Saint-Jacques, and the avenues René Coty, Général Leclerc, and Denfert-Rochereau [fr], as well as the streets Froidevaux, Victor-Considérant and de Grancey.

This square owes its original official recognition to letters patent dated 9 August 1760, which applied to the part of the site that was located inside the old Wall of the Farmers-General (i.e. the northeastern portion of the present Place Denfert-Rochereau).

The Wall of the Farmers-General, built under the ancien régime to prevent the evasion of excise taxes, separated Paris from the suburb of Montrouge.

It is mentioned in Les Misérables by Victor Hugo: Here, astride the opening in the wall, the architect Claude Nicolas Ledoux constructed two tollhouses to be used for the collection of the octroi, a local tariff levied on products entering Paris.

(At this time, for example, the village of Bitche, located near the German border on the Orne, had a Parisian square named for it because it had put up a spirited defense against the Prussians).

The entrance to the Paris Catacombs is now located within the recently renovated building with handsome romanesque arches across its facade, on the odd-numbered side of Avenue du Colonel-Henri-Rol-Tanguy.