Athani Taluk is the largest taluk in Belgaum District, Karnataka, India. It has a total area of 2,070.54 square kilometres (799.44 sq mi), of which 70% is cultivated. This includes 4 towns, 115 inhabited villages and hamlets with a rural population of 4,07,485, according to the 2011 census. The total population of the taluk is 5,25,832. It is bounded by Sangli District of Maharashtra in the north, Bijapur District in the east, and Bagalkot District in the southeast. Geologically the area is covered by Deccan Trap formations. The average annual rainfall is 582 millimetres (22.9 in). Two rivers flow through the taluk: the Krishna River and the Agrani.