| Bayannuur District | |
| Native Name: | Mongolian: Баяннуур сум |
| Native Name Lang: | mn |
| Settlement Type: | District |
| Pushpin Map: | Mongolia |
| Pushpin Label Position: | right |
| Pushpin Map Caption: | Location in Mongolia |
| Subdivision Type: | Country |
| Subdivision Name: | Mongolia |
| Subdivision Type1: | Province |
| Subdivision Name1: | Bulgan Province |
| Area Total Km2: | 960.7 |
| Population As Of: | 2009 |
| Population Total: | 1,526 |
| Timezone: | UTC + 8 |
| Utc Offset: | +8 |
| Coordinates: | 47.8303°N 104.4411°W |
Bayanuur (Mongolian: Баяннуур, Mongolian: rich lake) is a sum (district) of Bulgan Province in northern Mongolia. In 2009, its population was 1,526.[1]