| Reza Radmanesh | |
| Office2: | Member of Parliament of Iran |
| Term Start2: | 7 March 1944 |
| Term End2: | 12 March 1946 |
| Constituency2: | Lahijan |
| Party: | Tudeh Party of Iran |
| Otherparty: | Socialist Party (1920s) |
| Birth Date: | 1905[1] or 1906[2] |
| Birth Place: | Lahijan, Sublime State of Persia |
| Death Place: | Leipzig, East Germany |
| Alma Mater: | University of Paris |
| Nationality: | Iranian |
| Relatives: | Mohammad Ali Mojtahedi (cousin)[3] |
Reza Radmanesh (Persian: رضا رادمنش; 1905/06–1983) was an Iranian physicist, communist politician and general secretary of the Tudeh Party of Iran. According to Abbas Milani, he was "one of the most prominent members of the Iranian communist movement".[3]
Radmanesh was born into a Gilak landed upper-class family. He helped the local Jangalis as a teenager; and joined the Socialist Party while he studied at Dar ul-Funun. He went to France to study physics, and met Taghi Arani, before he returned to Iran as a junior member of The Fifty-Three. He was sentenced to five years of imprisonment.[4]
Radmanesh was a leading and dominating personality in the Tudeh Party of Iran, serving as a member of the party's central committee, head of its youth wing and its parliamentary leader before taking office as the first Secretary in 1948.[5]