Haddadi is a surname. Notable people with the surname include:
Ehsan Haddadi (born 1985), Iranian discus thrower Hamed Haddadi (born 1985), Iranian basketball player Oussama Haddadi (born 1992), Tunisian footballer
See also Dendropsophus haddadi, a species of frog Hadadi a village in the southern state of Karnataka, India