| Tüdevtei District | |
| Native Name: | Түдэвтэй сум |
| Native Name Lang: | mn |
| Settlement Type: | District |
| Subdivision Type: | Country |
| Subdivision Name: | Mongolia |
| Subdivision Type1: | Province |
| Subdivision Name1: | Zavkhan Province |
| Timezone: | UTC + 8 |
| Utc Offset: | +8 |
| Blank Name: | Climate |
Tüdevtei (Mongolian: Түдэвтэй) is a sum of Zavkhan Province in western Mongolia. Sum centre is 17 km South of Oigon Lake. In 2005, its population was 2,003.[1]