Alexey Semyonov may refer to:
- Alexey Alexandrovich Semyonov (born 1949), Russian association football player and coach
- Alexey Semyonov (mathematician) (born 1950), Russian scientist-mathematician, academician of the Russian Academy of Sciences
- Aleksey Semyonov (Uzbekistani footballer) (born 1968), Uzbekistan football defender
- Alexei Semenov (born 1981), Russian ice hockey defenceman
- Aleksei Vladimirovich Semyonov (born 1983), Russian association football player
- Alexei Semyonov (ice hockey) (born 1986), Russian ice hockey goaltender