| City | 2026 Pop. ↓ |
|---|---|
| Dezful | 300,658 |
| Durud | 181,789 |
| Dugonbadan | 107,535 |
| Darab | 91,081 |
| Damavand | 79,765 |
| Damghan | 59,784 |
| Dehdasht | 58,581 |
| Divandareh | 55,357 |
| Dorcheh Piaz | 54,687 |
| Dowlat Abad | 49,877 |
| Delijan | 48,738 |
| Dehbarez | 42,538 |
| Dehloran | 37,221 |
| Dargaz | 36,185 |
| Dehgolan | 32,981 |