Esfandiyār or Espandiyār is a legendary Iranian hero and one of the characters of Ferdowsi's Shahnameh. He was the son and the crown prince of the Kayanian King Goshtasp and Queen Katāyoun. He was the grandchild of Kay Lohrasp.

Esfandiyār is best known for the tragic story of a battle with Rostam described in Ferdowsi's epic Shahnameh (Epic of Kings). It is one of the longest episodes in Shahnameh and is one of its literary highlights.