Kalyandurg, also known as Kalyanadurg, is a town located in the Anantapur district of Andhra Pradesh, India. It serves as the administrative headquarters for both the Kalyandurg mandal and the Kalyandurg revenue division.
The region is notable for its geological significance, specifically regarding the discovery of diamond-bearing Kimberlites. The area is identified as one of the clusters where these deposits have been found.