Alexei or Alexey Ivanov may refer to:
Sportsmen
- Aleksei Ivanov (footballer born 1989), Russian footballer
- Aleksei Ivanov (footballer born 1981), Russian footballer with FC Saturn Moscow Oblast
- Aleksei Ivanov (footballer born 1980), Russian footballer
- Alexei Ivanov (ice hockey, born 1985), Russian ice hockey player drafted by the NHL Chicago Blackhawks
- Alexei Ivanov (ice hockey, born 1988), Kazakh ice hockey goaltender
- Alexey Ivanov (footballer) (born 1983), Russian footballer with FC Sever Murmansk
- Alexey Ivanov (athlete), Russian Paralympic track and field athlete
- Aliaksei Ivanou (born 1980), Belarusian skier
Others
- Alexei Viktorovich Ivanov (born 1969), Russian writer
- Aleksei Ivanovich Ivanov (1878–1937), Russian Sinologist and Tangutologist
- Aleksey Vladimirovich Ivanov, defendant in the United States case United States v. Ivanov