Mattupetty Dam (Madupetty Dam), near Munnar in Idukki District, is a storage concrete gravity dam built in the mountains of Kerala, India, to conserve water for hydroelectricity. It has been a vital source of power and huge revenue for Idukki District. The large amount of perennially available water allows wild animals and birds to flourish. Construction of the dam was led by E.U. Philipose, Superintending Engineer, Kerala State Electricity Board. ^{[citation needed]} The height of the dam is 83.35 metres (273.5 ft) and the length is 237.74 metres (780.0 ft). Taluks through which the release flows are Udumpanchola, Devikulam, Kothamangalam, Muvattupuzha, Kunnathunadu, Aluva, Kodungalloor and Paravur.

Munnar is located near the confluence of the mountain streams of Muthirappuzha River, Chanduvarai River and Kundale River.

The reservoir is also known to be one of the visiting grounds of elephants in the region.