| Olena Ronzhyna | |
| Fullname: | Olena Ronzhyna-Morozova |
| Birth Place: | Dnipropetrovsk, Ukrainian SSR, Soviet Union |
| Headercolor: | lightsteelblue |
| Show-Medal: | yes |
Olena Ivanivna Ronzhyna-Morozova (Ukrainian: Олена Іванівна Ронжина-Морозова; born 18 November 1970 in Dnipropetrovsk) is a retired rower from Ukraine, who won a silver medal at the 1996 Summer Olympics. She is a four-time Olympian.
Ronzhyna competed for the Unified Team at the 1992 Summer Olympics. She was a member of the Ukrainian team at the 1996 Summer Olympics in Atlanta, winning a silver medal in the women's quadruple sculls with teammates Inna Frolova, Svitlana Maziy, and Dina Miftakhutdynova. At her last Olympic appearance in 2004, she was disqualified with her team after one of her teammates, Olena Olefirenko, tested positive for ethamivan.