Himayat Sagar is an artificial lake about 20 kilometres (12 mi) from Hyderabad in the Ranga Reddy district of Telangana, India.

The storage capacity of the reservoir is 2.9 tmc ft.[1] The construction of reservoirs on the Esi, a tributary of the Musi River, was completed in 1927, with the intention of providing a drinking water source for Hyderabad and protecting the city from floods, which Hyderabad suffered in 1908.

The engineer at the time of construction was late Khaja Mohiuddin, son of Mohammed Hussein, Madri.

[citation needed] In 2022, the descendant of the royal family of the Nizam, Himayat Ali Mirza, has recently joined the movement to save Osman Sagar and Himayat Sagar" as he believes that these reservoirs are iconic landmarks of Hyderabad and still act as a lifeline for lakhs of people of the old city.

[3][4][5] If GO 111 is repealed, Himayat feared that many parts of the city might be affected by floods even with small summer rains.