Thirthahalli is a panchayat town located in the Shimoga district of the state of Karnataka, India.

It lies on the bank of the river Tunga and is also the headquarters of the Thirthahalli Taluk of Shimoga district.

[2] It has an average elevation of 591 metres (1938 feet).

The Tirthahalli Town Panchayat has population of 14,528 of which 7,093 are males while 7,435 are females as per report released by Census India 2011.

There are also a sizeable number of Tulu and Byari speakers in this region.