Hubli (or Hubballi) and Dharwad are twin cities in the Indian state of Karnataka. Hubli-Dharwad form the second-largest municipality and urban agglomeration of Karnataka in terms of population, after the capital Bangalore. While Dharwad is the administrative headquarters, the city of Hubli, situated about 20 km (12 mi) 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 has the world's longest railway platform and Dharwad is known as an educational hub of Karnataka, along with other Karnataka cities such as Udupi and Dakshina Kannada.