* Iran
* Afghanistan (known as Dari in Afghanistan)
* Tajikistan
It's also spoken by significant populations in other countries, including:
* Uzbekistan
* Turkmenistan
* Azerbaijan
* Pakistan
* Iraq
* Bahrain
* Oman
* United Arab Emirates
* Kuwait
* Qatar
In addition, there are sizable Persian-speaking communities in various Western countries, particularly in the United States, Canada, and Europe.