| Office2: | Ambassador of Iran to France |
| President2: | Mohammad Khatami Mahmoud Ahmadinejad |
| Term Start2: | 2002 |
| Term End2: | 2006 |
| Predecessor2: | Alireza Moayyeri |
| Successor2: | Ali Ahani |
| Birth Date: | 1963 3, df=yes |
| Birth Name: | Sayyid Mohammad Sadeq Kharazi |
| Birth Place: | Tehran, Iran |
| Party: | NEDA Party |
| Alma Mater: | New York University Durham University State University of New York |
Sayyid Mohammad Sadeq Kharazi (Persian: سید محمدصادق خرازی; born 2 March 1963) is a former Iranian diplomat and advisor to Iran's former President Khatami.
Kharazi started his career in 1983 during the Iran–Iraq War in the High Defence Council and the IRIB. He subsequently became Iran's ambassador to the United Nations in 1989, and after a period of six years he returned to Iran as Deputy Foreign Minister for Research. He became Iran's Ambassador to France in 2002 until 2006 when Mahmoud Ahmadinejad was elected into office. Kharazi was the chairman of the 1997 Tehran OIC Summit. He was also a key figure in the two-year nuclear negotiations with the EU trio.
Kharazi has a keen interest in calligraphic and historical manuscripts and is an avid collector of such items. He is a member of the board of several Iranian cultural, educational and research centers, including Tehran University, the Cultural Heritage Organization of Iran, and the National Library of Iran.
Currently, Kharazi works closely with Mohammad Khatami on the issue of dialogue among civilizations and is his senior advisor. He co-founded the 'Encyclopedia of Contemporary Islam', which researches Iran's cultural and political movements and schools of thought in the past two centuries. Additionally, he is the founder and editor of the Iranian Diplomacy website, the Iranian Economy website, and the Heritage of Iran and Islam website.