(* indicates extinct languages)
Northeastern
- Avestan*
- Chorasmian* (Khwarezmian)
- Bactrian*
- Sogdian* (dialects: Christian, Buddhist, Manichaean), Yaghnobi
- Scythian*, Sarmatian*, Alanian*, Ossetian (dialects: Iron, Digor), Jassic*
Southeastern
Northwestern
- Azari (the original Azeri language)
- Ormuri, Parachi
- Dialects of Central Iran:
- Tafresh: Ashtiani, Amora’i, Kahaki, Vafsi, Judeo-Hamadani, Judeo-Borujerdi, Judeo-Nahavandi, Alviri, Vidari
- Northwestern: Mahallati, Vanishani, Khunsari (Khwanshari), Judeo-Golpaygani, Judeo-Khunsari
- Northeastern: Arani, Bidgoli, Delijani, Nashalji, Abuzaydabadi, Qohrudi, Badrudi, Kamu’i, Jowshaqani, Meyma’i, Abyana’i, Farizandi, Yarandi (Yarani),Soi (Sohi), Badi, Natanzi, Kasha’i, Tari, Taqi, Judeo-Kashani
- Southwestern: Kafroni, Gazi, Sedehi, Ardestani, Nohuji, Sajzi, Jarquya’i, Rudashti, Kafrudi, Judeo-Esfahani
- Southeastern: Dari (Yazdi), Kermani, Nayini (Na’ini), Zefra’i, Anaraki, Varzenei, Judeo-Yazdi, Judeo-Kermani, Tudeshki, Keyjani, Abchuya’i
- Kavir: Khuri, Farvi, Farroki, Mehrjani
- Sivandi: Sivandi
- Kurdish (Dialects: Sorani (Central Kurdish), Kurmanji (Northern Kurdish), Southern Kurdish), Laki
- Gorani (Hawrami), Bajelan, Kirmanjki (Northern Zaza), Dimli (Southern Zaza), Shabak, Sarli
- Parthian*
- Semnani, Sangisari, Lasgerdi, Sorkhei
- Median*
- Mazandarani (Dialects: Saravi, Baboli, Amoli, Lafori;Salousi, Kelari, Shahsavari; Gorgani, Delandi; Shahmirzadi, Kholardi, Firoozkoohi; Astarabadi, Katouli)
- Balochi, Koroshi
- Gilaki, Rashti
- Talysh, Harzani, Eshtehardi, Gozarkhani, Kabatei, Kajali, Karingani, Kho'ini, Koresh-e Rostam, Maraghei, Kuhpaya’i, Razajerdi, Rudbari, Shahrudi, Takestani, Taromi
- Dezfuli
- Khalaj
Southwestern
- Old Persian*, Middle Persian*, Modern Persian: Iranian Persian, Dari Persian, Tajik Persian, Hazaragi Persian, Dzhidi Persian (Judeo-Persian), Madaglashti Persian, Judeo-Shirazi, Judeo-Bukharic, Khuzestani Persian, Aimaq, Darwazi Persian, Dehwari Persian, Pahlavani Persian
- Judeo-Tat, Muslim Tat
- Fars, Lari (Larestani), Bashkardi
- Luri (dialects: Luri, Mamasani, Kohkiluyeh, Bakhtiari), Kumzari