| Ecem Dönmez | |
| Alma Mater: | Yeditepe University |
| Education: | Political science and International relations |
| Strokes: | Freestyle |
| Club: | Fenerbahçe Swimming |
| Birth Date: | 1998 10, df=yes |
| Birth Place: | Turkey |
| Show-Medals: | yes |
Ecem Dönmez (born 29 October 1998) is a Turkish swimmer who specializes in freestyle swimming of 100 m and 200 m events. She takes part at the 2024 Summer Olympics in Paris, France.
Dönmez's passion for swimming started at the age of eight. Already at age 13, she set a new national record.
Dönmez is a member of Fenerbahçe Swimming in Istanbul.
Dönmez competed in the freestyle relay event at the 2019 World Aquatics Championships in Gwangju, South Korea.
She won the bronze medal together with Ela Naz Özdemir, Gizem Güvenç and Zehra Duru Bilgin in the freestyle relay event at the 2024 European Aquatics Championships in Belgrade, Serbia.
She was qualified to represent her country at the 2024 Summer Olympics in Paris, France together with her teammates Ela Naz Özdemir, Gizem Güvenç and Zehra Bilgin within the first 16 teams with 8:05.21 in the Women's freestyle relay event of the 2024 World Aquatics Championships in Doha, Qatar.
Ecem Dönmez was born on 29 October 1998. She studied Political science and International relations at Yeditepe University in Istanbul.
Ece Dönmez and Berkay Ömer Öğretir (born 1998), another Turkish swimmer competing at the 2024 Summer Olympics, married in Paris on 2 August after completing their competitions at the Olympic Games.