| Sergiu Rădăuțanu | |
| Office: | Chairman of the Supreme Soviet of the Moldavian SSR |
| Termstart: | 11 April 1967 |
| Termend: | 14 July 1971 |
| Premier: | Alexandru Diordiță Petru Pascari |
| Successor: | Artem Lazarev |
| Predecessor: | Andrei Lupan |
| Birth Place: | Chișinău, Kingdom of Romania |
| Death Place: | Saint Petersburg, Russia |
| Honorific Suffix: | OR |
| Birth Date: | 1926 6, df=y |
Sergiu Rădăuțanu (17 June 1926 – 6 March 1998) was a Moldovan physicist. He was a member of the Academy of Sciences of Moldova and professor at the State Technical University in Chișinău.