El Cajón Dam (Spanish: Dique El Cajón) is a dam in Capilla del Monte, Córdoba, Argentina.

It was built on the course of the Dolores River, at about 910 m (2,986 ft) above mean sea level.

The wall of the dam is 39 m (128 ft) tall and it creates a reservoir with a surface area of 1.45–1.8 km2 (0.6–0.7 sq mi) and a volume of 8,000,000 m3 (280,000,000 cu ft).

The dam is used as a reservoir of fresh water, to regulate the flow of the river, for fishing (carp and silverside), sailing, canoeing, and windsurfing.

The dam cost a total of approximately USD 800 million to construct.