Réservoir de Ménilmontant, Water tank in Ménilmontant district, Paris, France.

The Réservoir de Ménilmontant is a covered water reservoir in the Saint-Fargeau district of Paris's 20th arrondissement, bounded by the rues Saint-Fargeau, Darcy and du Surmelin. Built between 1863 and 1865 by engineer Eugène Belgrand, it holds 95,000 m³ and supplies the northern and north-eastern parts of the capital. The photograph does not show the structure itself.

Engineer Eugène Belgrand built this first water storage facility within Paris in 1865. This construction marked a turning point in the city's modern water supply system.

The reservoir represents a fundamental component of Paris water management system, alongside four other major tanks distributed throughout the capital.

Water arrives at the facility through aqueducts and pumping stations from the Seine near Ivry and the Marne near Joinville-le-Pont. Visitors can view the structure from outside, with the best perspective available from the surrounding neighborhood streets.

The reservoir holds 95,000 m³, about one-sixth of the theoretical daily consumption of Paris. It supplies water to 15% of Parisians and is run by the municipal utility Eau de Paris. It sits between the rues Saint-Fargeau, Darcy and du Surmelin, near the Saint-Fargeau station on line 3bis.