Haydar Mirza Safavi (Persian: حیدر میرزا صفوی‎‎, also spelled Haidar Mirza Safavi) was a Safavid prince, who declared himself as the king (shah) of Iran on 14 May 1576, immediately after his father Tahmasp I had died. He was, however, during the same day killed by the Qizilbash tribes that favored his brother Ismail Mirza Safavi as the successor of their father.