11 cities
| City | 2026 Pop. ↓ |
|---|---|
| Thanh Hoa | 3,640,128 |
| Thai Nguyen | 1,286,751 |
| Tay Ninh | 1,169,165 |
| Tra Vinh | 1,009,168 |
| Tuyen Quang | 784,811 |
| Thu Dau Mot | 538,307 |
| Tuy Hoa | 69,596 |
| Tan An | 64,801 |
| Thanh Pho Uong Bi | 63,829 |
| Tam Ky | 59,000 |
| Thai Binh | 53,071 |