| Official Name: | Sagan-Nur |
| Native Name: | Саган-Нур |
| Settlement Type: | Selo |
| Pushpin Map: | Russia Buryatia#Russia |
| Subdivision Type: | Country |
| Subdivision Name: | Russia |
| Subdivision Name1: | Republic of Buryatia |
| Subdivision Name3: | Mukhorshibirsky District |
| Subdivision Type4: | Municipality |
| Utc Offset1: | +8:00 |
| Coordinates: | 51.3333°N 134°W[1] |
Sagan-Nur (Russian: Саган-Нур; Buriat: Сагаан Нуур, Sagaan Nuur) is a rural locality (a selo) in Mukhorshibirsky District, Republic of Buryatia, Russia. The population was 3,985 as of 2017.[2] There are 56 streets.
Sagan-Nur is located 73 km northeast of Mukhorshibir (the district's administrative centre) by road. Kusoty is the nearest rural locality.[3]