Sergei

Sergei may refer to:
* Sergei Kozin - a prisoner of Vorkuta
* Sergei Ravenov - a member of Spetsnaz in Call of Duty: Black Ops Cold War Zombies
* Sergei Konstantinov - a Soviet soldier in Call of Duty: Finest Hour
* Sergey - a Russian Ultranationalist in Call of Duty 4: Modern Warfare