| City | Region | Country | Time Zone | Population | |
|---|---|---|---|---|---|
| Yen Bai | Yen Bai Province | Vietnam | Indochina Time | 96,540 | |
| Nghia Lo | Yen Bai Province | Vietnam | Indochina Time | 68,206 | |
| Thi Tran Tram Tau | Yen Bai Province | Vietnam | Indochina Time | -- | |
| Mu Cang Chai | Yen Bai Province | Vietnam | Indochina Time | -- | |
| Son Thinh | Yen Bai Province | Vietnam | Indochina Time | -- | |
| Co Phuc | Yen Bai Province | Vietnam | Indochina Time | -- | |
| Thi Tran Yen The | Yen Bai Province | Vietnam | Indochina Time | -- |

