Sergei

Sergei, in the works of Harry Turtledove, may refer to:
 * Sergei, fictional Red Army soldier, POV of "Black Tulip".
 * Sergey Gorshkov
 * Sergei Morozhin, minor fictional character in Worldwar.
 * Sergei Pavlov
 * Sergei Tolmasov
 * Sergei Yaroslavsky