Heidar Shonjani or Haydar Shonjani (Persian: ???? ????????, born 16 December 1945), was an Iranian swimmer and water polo player.
His first international tournament was the 1964 Summer Olympics, where he became the first Iranian swimmer to participate in the Summer Olympics; he swam 100 m freestyle, but failed to reach the final.
Shonjani was a member of Iran national water polo teams that competed at the 1974 Asian Games and 1976 Summer Olympics, and won a gold medal in 1974.