Oleksandr Sydorenko (27 May 1960 – 20 February 2022), also known as Aleksandr Sidorenko, was an individual medley swimmer from the USSR.

[2] At the 1983 Summer Universiade in Edmonton, he won a silver medal in the 200-metre individual medley.

Sydorenko won the 400 m individual medley at the 1980 Summer Olympics in Moscow.

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.