Map of South India with Hyderabad-Karnataka region highlighted in Grey
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Hyderabad-Karnataka is a region located in north-east Karnataka, India. It is the Kannada speaking part of the Hyderabad State that was ruled by the Nizams of Hyderabad until 1948. After merging with the Indian union, the region was part of Hyderabad State until 1956. The Hyderabad-Karnataka region comprises Bidar, Yadgir, Raichur, Koppal, Bellary and Gulbarga that are in the present state of Karnataka. The Hyderabad-Karnataka region is the second largest arid region in India. 
Kalyana Karnataka (Kannada: ಕಲ್ಯಾಣ ಕರ್ನಾಟಕ ) was the term coined by noted Kannada activist Dr. Chidananda Murthyto refer to Hyderabad-Karnataka as an administrative block with Gulbarga as the administrative headquarters. It consists of 6 districts namely Bellary(From Madras Presidency), Bidar, Gulbarga, Yadgir, Raichur and Koppal(From the state of Hyderabad). Kalyana Karnataka is also called Gulbarga division. The provisions of Article 371(J) of the Constitution aimed at bringing about all-round development in the six districts of the Hyderabad-Karnataka region.
- "Home". Hyderabad Karnataka area development board. 2009. Retrieved 28 April 2013.
- Dev, Vanu (19 December 2012). "Karnataka wins 4-decade-old battle; gets special status for Hyderabad-Karnataka region". India Today. Retrieved 28 April 2013.
- "Hyderabad-Karnataka special status will be Congress poll plank". Times of India. 23 April 2013. Retrieved 28 April 2013.
- "Bill giving special status for Hyderabad-Karnataka region raises Telangana hopes". Times of India. 20 December 2012. Retrieved 28 April 2013.