Amaravathi Reservoir, reservoir in Tamil Nadu, India

Amaravathi Reservoir is the 9.31-square-kilometre impoundment of the steep Amaravathi Dam on the Amaravathi River at Amaravathinagar, in the Indira Gandhi Wildlife Sanctuary, Tiruppur district. The dam stands 33.53 metres deep and holds water for irrigation and flood control; four megawatts of hydroelectric capacity were added after a 2003–04 proposal by the Tamil Nadu Electricity Board.

The dam was built across the Amaravathi River in 1957, during K. Kamaraj's administration, about 25 km upstream and south of the Thirumoorthy Dam. It was built primarily for irrigation and flood control. Siltation has since cut its capacity by 25%, from 4 tmcft to 3 tmcft, and a 4 MW hydro-electric station proposed in 2003–04 now operates at the site.

The reservoir serves as more than just a place to visit for local communities. It is central to daily life, with farmers depending on it to irrigate their fields and supply water to households throughout the region.

The dam and crocodile farm are open daily from 9:00 a.m. to 6:00 p.m. From Coimbatore, the 96 km route runs via Pollachi and Udumalpet to Amaravathinagar. A forest rest house near the crocodile farm accommodates four people with advance reservation.

The reservoir is home to one of the largest crocodile populations in the country, known as India's largest crocodile nursery. Around 100 crocodiles, including Persian and large South Indian species, live here under protection and care of forest officials.