Golconda (Telugu: గోల్కొండ, romanized: Gōlkōnḍa) is a historic fortress and ruined city located in the western outskirts of Hyderabad, Telangana, India. It was originally called Mankal (mānugallu). The fort was originally built by Kakatiya ruler Pratāparudra in the 11th century out of mud walls. It was ceded to the Bahmani Kings by Deo Rai, Rajah of Warangal during the reign of Sultan Muhammad Shah (1358–1375 A.D.) of the Bahmani Sultanate. Following the death of Sultan Mahmood Shah, the Sultanate disintegrated and Sultan Quli, who had been appointed as the Governor of Hyderabad by the Bahmani Kings, fortified city and made it the capital of the Golconda Sultanate. Because of the vicinity of diamond mines, especially Kollur Mine, Golconda flourished as a trade centre of large diamonds known as Golconda Diamonds. Golconda fort is currently abandoned and in ruins.

The complex was put by UNESCO on its "tentative list" to become a World Heritage Site in 2014, with others in the region, under the name Monuments and Forts of the Deccan Sultanate (despite there being a number of different sultanates).