| Xireg | |
| Settlement Type: | Town |
| Pushpin Map: | China |
| Pushpin Label Position: | above |
| Pushpin Mapsize: | 300 |
| Pushpin Map Caption: | Location in China |
| Subdivision Type: | Country |
| Subdivision Name: |  China |
| Subdivision Type1: | Province |
| Subdivision Name1: | Qinghai |
| Subdivision Type2: | District |
| Subdivision Name2: | Ulan County |
| Timezone: | China Standard Time |
| Utc Offset: | +8 |
| Coordinates: | 36.925°N 98.478°W |
| Order: | st |
| S: | 希里沟镇 |
| P: | Xīlǐgōu Zhèn |
| Monr: | sirigi balɣasu |
| Mon: | Ширх балгас |
Xireg is a town in and county seat of Ulan County in Qinghai province, China. The town is located in a fertile valley. Wulan railway station and the G315 highway connects the town to other parts of China.