Bayantümen (Mongolian: Баянтүмэн), also Tsagaanders (Mongolian: Цагаандэрс) is a sum (district) of Dornod Province in eastern Mongolia. Name "Bayantümen" was in use for Choibalsan city (before 1941), the railway station and mine in the NE outskirts of Choibalsan city have name of Bayantümen also.
| Sums of Dornod | ||
|---|---|---|
| Bayan-Uul | Bayandun | Bayantümen | Bulgan | Choibalsan (sum) | Chulunkhoroot | Dashbalbar | Gurvanzagal | Khalkhgol | Kherlen (Choibalsan city) | Khölönbuir | Matad | Sergelen | Tsagaan-Ovoo |
 |
|
