| Honorific Prefix: | Timsar |
| Saeed Mehdiyoun | |
| Birth Name: | Seyyed Saeed Mehdiyoun |
| Birth Date: | April 17, 1928 |
| Birth Place: | Zanjan |
| Death Place: | Iran |
| Allegiance: | Iran |
| Branch: | Imperial Iranian Air Force |
| Serviceyears: | 1949–1979 |
| Rank: | Lieutenant general |
Saeed Mehdiyoun (Persian: سعید مهدیون; 1928 - died 15 August 1980) was an Iranian fighter pilot. He was appointed as the commander of Imperial Iranian Air Force in mid-February 1979 replacing Amir Hossein Rabii in the post. However, he was ousted two days later for lack of popularity among the subordinate personnel. While trying to flee the country, he was arrested for taking part in Nojeh coup plot and subsequently executed for it on 15 August 1980.