| Oleksandr Sydorenko | |
| Fullname: | Oleksandr Oleksandrovych Sydorenko |
| Nationality: | Ukrainian |
| Strokes: | Individual medley |
| Birth Date: | 27 May 1960 |
| Birth Place: | Zhdanov, Ukrainian SSR, USSR |
| Death Place: | Mariupol, Ukraine |
| Weight: | 82kg (181lb) |
thumb|right|236px|Sidorenko in 1980 on Moscow Olympics
Oleksandr Sydorenko (27 May 1960 – 20 February 2022), also known as Aleksandr Sidorenko, was an individual medley swimmer from the USSR. He won the 400 m individual medley at the 1980 Summer Olympics in Moscow.[1]
Sydorenko won a gold medal at the 1981 European Aquatics Championships in Split, and at the 1982 World Aquatics Championships in Guayaquil in the 200-metre individual medley.[2]
At the 1983 Summer Universiade in Edmonton, he won a silver medal in the 200-metre individual medley.[3] Between 1977 and 1986 he became the USSR champion 20 times.
Sydorenko won the 400 m individual medley at the 1980 Summer Olympics in Moscow.[4]
He worked from 1987 to 2014 as the manager of the water polo team "Ilyichevets." After retirement he worked as a volunteer in the water Polo Federation of the city of Mariupol.
Sydorenko married the bronze medal-winner of the 1980 Olympic Games, Yelena Kruglova, in 1982. Sydorenko was awarded the Order of Friendship of Peoples (USSR).
Oleksandr Sydorenko died from COVID-19[5] in Mariupol on 20 February 2022, at the age of 61.[6]