Boris, and its diminutive Borya, in the works of Harry Turtledove, may refer to:

Characters known only as Boris:

Father Boris, fictional Bulgarian priest in "The Bleeding Moon".
Borya, a medic and minor character in The Hot War: Fallout.

Characters whose first name is Boris:

Boris Antipov, fictional Soviet General, minor character in The Man With the Iron Heart.
Boris Gribkov, fictional Soviet airman and POV in The Hot War.
Boris Lavochkin, fictional US Army officer in Settling Accounts: In at the Death.
Boris Lidov, fictional NKVD agent, minor character in Worldwar.
Boris Suslov, a Russian colonist on Haven in "Hang Together".