| Choibalsan District | |
| Native Name: | Чойбалсан сум |
| Native Name Lang: | mn |
| Settlement Type: | District |
| Subdivision Type: | Country |
| Subdivision Name: | Mongolia |
| Subdivision Type1: | Province |
| Subdivision Name1: | Dornod Province |
| Area Total Km2: | 10,152 |
| Timezone: | UTC + 8 |
| Utc Offset: | +8 |
Choibalsan District (Mongolian: Чойбалсан) is a sum (district) of Dornod Province in eastern Mongolia. Sum center is 55 km North from the Dornod aimag capital Choibalsan city. Sum center has railway station Kherlengol on the Borzya (Russia) - Choibalsan city line. In 2009, its population was 2,691.[1]