| Gajanur, Shimoga | |
| Native Name Lang: | kn |
| Settlement Type: | village |
| Pushpin Map: | India Karnataka#India |
| Pushpin Label Position: | right |
| Pushpin Map Caption: | Location in Karnataka, India |
| Coordinates: | 13.839°N 75.527°W |
| Subdivision Type: | Country |
| Subdivision Name: |  India |
| Subdivision Type1: | State |
| Subdivision Name1: | Karnataka |
| Subdivision Type2: | District |
| Subdivision Name2: | Shivamogga |
| Unit Pref: | Metric |
| Population Density Km2: | auto |
| Demographics Type1: | Languages |
| Demographics1 Title1: | Official |
| Demographics1 Info1: | Kannada |
| Timezone1: | IST |
| Utc Offset1: | +5:30 |
| Postal Code Type: | PIN |
| Postal Code: | 577 220 |
| Area Code Type: | Telephone code |
| Area Code: | 08182 |
| Registration Plate: | KA-14 |
Gajanur is a village 12 km from Shimoga in the Shimoga district of Karnataka, India. The Tunga river flows through the village. Gajanur is well known for the dam built across the river.1 km from Gajanur there is place called "Sakkarebaylu" which is an elephant training camp run by the government of India. located on the banks of the Tunga river. It is 15 km from "Mandagadde" bird life sanctuary.There is a JNV, Gajanur (JVNG) boarding school near Gajanur. JNVG is funded by the Indian Ministry of Human Resources Development
It is built across Tunga River, to serve drinking and irrigation purpose of Shivamogga city and other taluks of the district. The length of dam is 532.35 metres, and full reservoir level of 583.04 metres. Its gross storage capacity is only 3.24 TMC ft.,even though it was planned for 12 TMC ft.
Water from the dam is pumped to Bhadra Dam during the peak monsoon season, which is then further used to serve dry regions of Chitradurga district.