Nizam Sagar Dam (నిజాం సాగర్) is an Indian dam. It is a reservoir constructed across the Manjira River, a tributary of the Godavari River, between Achampet and Banjapalle villages of the Nizamabad district in Andhra Pradesh, India. Water from the reservoir is sent to meet the drinking needs of the twin cities, Hyderabad and Secunderabad. It is located at about 144 km north-west of Hyderabad. Nizamsagar dam was constructed in 1923 by the then rulers of the erstwhile Hyderabad State, Mir Osman Ali Khan. It is made by making over 40 villages empty. It is one of the biggest in the worlds Best Place to visit. Mahatma Gandhi & Jawaharlal Nehru visited this place in early 1940s.
This masonry dam sprawling across the river for 3 km with a fourteen feet wide motorable road over it. There are excellent boarding and lodging facilities nearby, for tourists. Nizam sagar Project is the second irrigation scheme on Manjira river and the largest in the then Hyderabad state taken up during the year 1923 and completed by the year 1931. This Project was originally contemplated for utilization of 58.00 TMC of water to irrigate 2,75,000 acres in Banswada, Bodhan, Nizamabad and Armoor Taluks of Nizamabad District. After reorganization of States in 1956, the Manjira basin got distributed among the three states viz., Maharashtra, Karnataka and Andhra Pradesh.