This is a list of the rivers that flow wholly or partly in Iran, arranged geographically by river basin from west to east.

• Arvand Rud
  • Haffar, originally an artificial channel now forming the estuary of the Karun
  • Karun River
    • Marun River
    • Dez River
      • Bakhtiari River
      • Koohrang
• Tigris (Iraq)
  • • Karkheh River
      • Seimareh River
    • Chankula River
    • Sirwan River (Diyala River)
      • Alwand River
    • Little Zab
• Bahmanshir, the original mouth of the Karun
• Jarahi
• Zohreh River
• Helleh River
• Mond River
  • Shur River
• Mehran River
• Kul River
  • Gowdeh River
  • Rostam River

• Dozdan River
• Jagin River
• Gabrik River
• Bahu Kalat River (or Dashtiari River or Silup River)

• Aji Chay
  • Quri Chay
• Zarrineh River
• Gadar River
• Ghaie River
• Alamlou River
• Leylan River
• Simineh River
• Mahabad River
• Barandouz River
• Shahar River
• Nazlou River
• Rozeh River
• Zola River

• Kura River (Azerbaijan)
  • Aras River
    • Balha River
      • Tulun River
    • Zangmar River
      • Barun River
• Sefīd-Rūd
  • Qizil Üzan
  • Shahrood
    • Alamut River
• Cheshmeh Kileh River
  • Do Hezar River
  • Se Hazar River
• Chaloos River
  • Sardab River
• Kojoor River
• Haraz River
  • Noor River
  • Lar River
• Atrek River
  • Sumbar River
• Gharasu River

• Abhar River
• Qom River
• Jajrood River
• Karaj River

• Zayande River

• Halil River
• Bampur River

• Helmand River

• Mashkid River (Mashkel River)

• Harirud
  • Kashaf River

• Shesh Taraz
• Lake Tar

• Inventory of Shared Water Resources in Western Asia - waterinventory.org
• Water Resources and Quality in Iran - fanack.com