| Bayan-Önjüül District | |
| Native Name: | Баян-Өнжүүл сум |
| Native Name Lang: | mn |
| Settlement Type: | District |
| Subdivision Type: | Country |
| Subdivision Name: | Mongolia |
| Subdivision Type1: | Province |
| Subdivision Name1: | Töv Province |
| Timezone: | UTC + 8 |
| Utc Offset: | +8 |
Bayan-Önjüül (Mongolian: Баян-Өнжүүл, Rich sleepover) is a sum of Töv Province in Mongolia. The Baraat settlement (former Bayan-Baraat sum center) is 30 km SE from Bayan-Önjüül sum center.