Hubli-Dharwad are twin cities in Indian state of Karnataka. Hubli-Dharwad is the second-largest conurbation in Karnataka after Bengaluru. While Dharwad is the administrative headquarters, the city of Hubli, situated about 20 km south-east of Dharwad, is the commercial centre and business hub of North Karnataka.
The cities have a single municipal corporation called Hubli-Dharwad Municipal Corporation (HDMC). 
Hubli - Dharwad Municipal Corporation 
Hubli-Dharwad Municipal Corporation is municipal corporation for twin cities of Hubli and Dharwad in Karnataka state in India. It was constituted in 1962 by combining two cities separated by a distance of 20 kilometers. The area covered by the corporation is 181.66 km². spread over 45 revenue villages. The population of the city as per the 1991 census was 7 lakhs (700,000).