Hubli is a city in the Indian state of Karnataka. The twin cities Hubli–Dharwad form the second largest city in the state by area and …Hubli is a city in the Indian state of Karnataka. The twin cities Hubli–Dharwad form the second largest city in the state by area and population and the largest city in North Karnataka. Hubli is in Dharwad district of Karnataka and is the taluk headquarters of Hubli City and Hubli Rural. Although it hosts the HDMC office, the district headquarters is in Dharwad.