| Thirthahalli | |
| Settlement Type: | Taluk |
| Pushpin Map: | India Karnataka |
| Pushpin Label Position: | right |
| Pushpin Map Caption: | Location in Karnataka, India |
| Coordinates: | 13.69°N 75.245°W |
| Subdivision Type: | Country |
| Subdivision Name: |  India |
| Subdivision Type1: | State |
| Subdivision Name1: | Karnataka |
| Subdivision Type2: | District |
| Subdivision Name2: | Shimoga district |
| Subdivision Type3: | Region |
| Subdivision Name3: | Malenadu |
| Leader Title: | MLA |
| Leader Name: | Araga Jnanendra |
| Unit Pref: | Metric |
| Area Total Km2: | 5.91 |
| Elevation Footnotes: | 566 |
| Elevation M: | 591 |
| Population Total: | 14357 |
| Population As Of: | 2011[1] |
| Population Density Km2: | auto |
| Demographics Type1: | Languages |
| Demographics1 Title1: | Official |
| Demographics1 Info1: | Kannada |
| Demographics Type2: | Languages |
| Timezone1: | IST |
| Utc Offset1: | +5:30 |
| Postal Code Type: | PIN |
| Postal Code: | 577 432 |
| Area Code Type: | Telephone code |
| Area Code: | 08181 |
| Registration Plate: | KA-14 |
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.Birthplace of KUVEMPU.
Thirthahalli is located at .[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.
The majority of people speak Kannada. There are also a sizeable number of Tulu speakers in this region.