| Mariana Constantin | |
| Birth Date: | 1960 8, df=yes |
| Birth Place: | Ploieşti, Romania[1] |
| Height: | 160 cm |
| Discipline: | WAG |
| Club: | Petrolul Ploieşti[2] |
| Headcoach: | Leana Sima |
| Assistcoach: | Béla KárolyiMarta Károlyi |
| Choreographer: | Geza Pozar |
| Show-Medals: | yes |
Mariana Constantin (born 3 August 1960) is a retired Romanian artistic gymnast. She won a team silver medal at the 1976 Olympics.[1]