Iranshahr may refer to:

Ērānshahr or Īrānshahr, the Sasanian Empire
Greater Iran or Iranshahr
Iranshahr (city), a city in the Sistan and Baluchestan Province, Iran
Piranshahr (Former name), a city in West Azerbaijan Province, Iran.
Iranshahr County, a county in the Sistan and Baluchestan Province, Iran
Iranshahr Atash Behram, the holiest Zoroastrian atashkadeh in India
Fahraj, formerly Iranshahr, a city in Kerman Province, Iran
Iran Shahi or Iranshahr, a village in Lorestan Province, Iran
The Parthian province of Nishapur, which also included Sistan