Oleksiy Serhiyovych Semenov (; born June 27, 1982) is a Ukrainian discus thrower. He competed for the men's event at the 2008 Summer Olympics in Beijing, where he finished twenty-fourth in the qualification round, with a distance of 60.18 metres. His personal best in the outdoor season is 65.96 metres, which was further achieved on July 15, 2012 in Kyiv.
Semenov is currently a member of Dynamo Donetsk for track and field.