24 cities
| City | 2026 Pop. ↓ |
|---|---|
| Shiraz | 1,784,280 |
| Sanandaj | 488,805 |
| Sari | 341,682 |
| Sabzevar | 226,183 |
| Sirjan | 207,645 |
| Saveh | 175,533 |
| Saqqez | 151,237 |
| Shahrud | 131,889 |
| Shahr-e Kord | 129,153 |
| Semnan | 124,826 |
| Shirvan | 82,790 |
| Salmas | 81,606 |
| Shahre Jadide Andisheh | 80,000 |
| Shushtar | 77,507 |
| Shahriar | 58,849 |
| Shahr-e Babak | 52,409 |
| Shush | 52,284 |
| Sarpol-e Zahab | 51,611 |
| Sarakhs | 46,499 |
| Sonqor | 43,174 |
| Susangerd | 41,443 |
| Shahin Dezh | 41,442 |
| Shadegan | 37,220 |
| Semirom | 27,220 |