Indirasagar Dam, Hydroelectric dam in Madhya Pradesh, India.

Indirasagar is a 92-metre-high, 653-metre-long concrete gravity dam on the Narmada River at Narmada Nagar, Punasa, in Khandwa district, Madhya Pradesh. Its reservoir stores 12.22 billion cubic metres, the largest water storage capacity of any dam in India. The powerhouse is the second-largest surface powerhouse in the country.

Prime Minister Indira Gandhi laid the foundation stone on 23 October 1984, and work on the main dam itself began in 1992. Built as a joint venture of the Madhya Pradesh irrigation department and the National Hydroelectric Power Corporation, it was commissioned in 2005, with the first of eight units generating from January 2004. Creating the reservoir displaced a town of 22,000 people and 100 villages.

The dam is named after former Prime Minister Indira Gandhi, reflecting its importance in the nation's development. The reservoir has become central to how local communities access water and manage their land.

The dam lies on the Narmada at Narmada Nagar, about 12 km from Punasa in Khandwa district. The concrete gravity section is 653 m long and 92 m high, with the powerhouse on the surface beside it. The reservoir is the largest in India by storage, holding 12.22 billion cubic metres.

The reservoir holds 12.22 billion cubic metres, the largest water storage of any dam in India, ahead of Rihand and Nagarjuna Sagar. Its powerhouse, with eight 125 MW units, is the second-largest surface powerhouse in the country. The first unit was generating by January 2004, before the rest of the project was commissioned.