Mir Alam Tank is a tank in Hyderabad, India, located to the south of Musi River. It was the primary source of drinking water to Hyderabad before Osman Sagar and Himayat Sagar were built.
The tank was named after Mir Alam Bahadur, then Prime Minister (1804 - 1808) of Hyderabad state during the reign of Asaf Jah III, the third Nizam of Hyderabad state. Mir Alam laid the foundation for the tank on July 20, 1804 and it was completed in about two years on June 8, 1806.
Nehru Zoological Park lies adjacent to the tank and AP tourism operates boats on the lake, for which one has to enter through the zoo.