| Bayantümen District | |
| Native Name: | Баянтүмэн сум |
| Native Name Lang: | mn |
| Settlement Type: | District |
| Subdivision Type: | Country |
| Subdivision Name: | Mongolia |
| Subdivision Type1: | Province |
| Subdivision Name1: | Dornod Province |
| Area Total Km2: | 8,321 |
| Timezone: | UTC + 8 |
| Utc Offset: | +8 |
Bayantu'men (Mongolian: Баянтүмэн, Rich tumen), also Tsagaanders (Mongolian: Цагаандэрс) is a sum (district) of Dornod Province in eastern Mongolia. Name "Bayantu'men" was in use for Choibalsan city (before 1941), the railway station and mine in the NE outskirts of Choibalsan city have name of Bayantu'men also. In 2009, its population was 2,006.[1]