Major Dialects:
| Language | Speakers |
|---|---|
| Azerbaijani | 23,055,410 |
| Kurdish | 6,600,000 |
| Gilaki | 2,400,000 |
| Luri | 2,375,000 |
| Mazandarani | 2,340,000 |
| Standard Arabic | 1,320,000 |
| Mesopotamian Spoken Arabic | 1,280,000 |
| Balochi | 1,178,000 |
| Laki | 1,000,000 |
| Bakhtiâri | 1,000,000 |
| Kashkay | 959,000 |
| Khorasani Turkish | 886,000 |
| Turkmen | 719,000 |
| Dari | 378,000 |
| Takestani | 374,000 |