Garshāsp (Persian: گرشاسپ pronounced [gæɹ'ʃɒːsp]) was, in Persian mythology, the last Shah of the Pishdadian dynasty of Persia according to Shahnameh. He was a descendant of Zaav, ruling over the Persian Empire for about nine years. His name is shared with a monster-slaying hero in Iranian mythology. The Avestan form of his name is Kərəsāspa and in Middle Persian his name is Kirsāsp.
Garshasp is depicted as a dragonslayer in the Avesta. In Zoroastrian eschatology, Garshasp's resurrection was depicted. His role was to slay the monster Zahhak.