Demidov is a Russian noble family.

Demidov may also refer to: Demidov (surname) or Demidova, a surname Demidov, Smolensk Oblast, a town and the administrative center of Demidovsky District of Smolensk Oblast, Russia Demidov (inhabited locality), a list of inhabited localities named Demidov Demidov Bridge, a bridge in St. Petersburg, Russia Demidov Island, an island in Antarctica

See also Demidov Prize, a national scientific prize in the Russian Empire