| Official Name: | Tuzhinka |
| Native Name: | Тужинка |
| Native Name Lang: | ru |
| Settlement Type: | Settlement |
| Pushpin Map: | Russia Buryatia#Russia |
| Subdivision Type: | Country |
| Subdivision Name: | Russia |
| Subdivision Type1: | Region |
| Subdivision Name1: | Republic of Buryatia |
| Subdivision Type2: | County |
| Subdivision Type3: | District |
| Subdivision Name3: | Yeravninsky District |
| Subdivision Type4: | Municipality |
| Utc Offset1: | +8:00 |
| Coordinates: | 52.3°N 142°W[1] |
Tuzhinka (Russian: Тужинка; Buriat: Тужа, Tuja) is a rural locality (a settlement) and the administrative centre of Tuzhinkinskoye Rural Settlement, Yeravninsky District, Republic of Buryatia, Russia. The population was 507 as of 2017.[2] There are 8 streets.
Tuzhinka is located 78 km southwest of Sosnovo-Ozerskoye (the district's administrative centre) by road. Ust-Egita is the nearest rural locality.[3]