Sergei (or Sergey) Stepanov may refer to:
- Sergei Aleksandrovich Stepanov (born 1941), Russian mathematician
- Sergei Stepanov (footballer), born 1976
- Sergei Stepanov (politician) from Transnistria
- Sergey Stepanov (musician) (better known as "Epic Sax Guy"), a saxophonist, member of the SunStroke Project
- Sergey Stepanov (wrestler) (born 1999), Russian Greco-Roman wrestler.