Thirthahalli (Kannada:ತೀರ್ಥಹಳ್ಳಿ)([t̪iɾt̪ʰəhʌɭɭi]) 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.