Dumitru Dediu (May 12, 1942 in Galaţi) was a cosmonaut of the Romanian Air Force.
In 1978, Dediu was selected as the backup for Dumitru Prunariu for the Soyuz 40 mission.  He currently serves in the Romanian Army and lives in Bucharest.
- ^ Hall, Rex; David Shaler; Bert Vis (2005). Russia's cosmonauts: inside the Yuri Gagarin Training Center. Springer-Praxis books in space exploration. Birkhäuser. p. 211. ISBN 978-0-387-21894-6.
- ^ Hooper, Gordon R. (1986). The Soviet cosmonaut team: a comprehensive guide to the men and women of the Soviet manned space programme. GRH Publications. pp. 53,65,237. ISBN 978-0-9511312-0-6.