Krishnagiri Dam, Irrigation dam in Krishnagiri district, Tamil Nadu, India.

Krishnagiri Dam, also called the Krishnagiri Reservoir Project (KRP) Dam, crosses the Thenpennai River near Dhuduganahalli, 7 km from Krishnagiri. Its 990.59 m structure rises 29.26 m above the foundation, with an ogee-crest spillway at 483.11 m and eight gates measuring 12.19 by 6.10 m. The reservoir's original gross storage of 68.2 MCM had fallen to 47.16 MCM by 2006 because of sedimentation.

Krishnagiri Dam was proposed during India's First Five-Year Plan and construction began on 3 January 1955. The project was championed by S. Nagaraja Manickarar, MLA for Kaveripattinam, after earlier requests were refused for lack of funds; Chief Minister K. Kamaraj secured central drought-relief money on Rajaji's advice. Water was released for irrigation on 3 November 1957, and the dam was inaugurated by Kamaraj.

The dam's park, covering 60 acres split between the right and left banks, holds a deer farm alongside lawns, fountains and children's play equipment. The reservoir is also fished, and the surrounding area draws birdwatchers. The project is named for the town it serves, Krishnagiri, and is known locally as KRP Dam.

The KRP Dam Park, run by the Tamil Nadu Public Works Department, is open every day of the week and has two- and four-wheeler parking beside it. Monkeys roam the grounds, so keep food out of sight. The park holds a children's play area, fountains, lawns and a jogger footpath, and the dam and park can be visited year-round.

The reservoir's storage capacity fell from 68.2 million cubic metres to 47.16 million by 2006 because of heavy sedimentation. The dam's eight spillway gates each measure 12.19 by 6.10 metres, and the ogee crest sits at 483.11 metres.