| Bayan-Adarga District | |
| Native Name: | Баян-Адарга сум |
| Native Name Lang: | mn |
| Settlement Type: | District |
| Subdivision Type: | Country |
| Subdivision Name: | Mongolia |
| Subdivision Type1: | Province |
| Subdivision Name1: | Khentii Province |
| Area Total Km2: | 3,021 |
| Timezone: | UTC + 8 |
| Utc Offset: | +8 |
Bayan-Adarga (Mongolian: Баян-Адарга) is a sum (district) of Khentii Province in eastern Mongolia. In 2010, its population was 2,205.[1]