Vadim Sergeievich Demidov (Russian: Вадим Серге́евич Демидов; born 10 October 1986) is a Norwegian retired international footballer who played as a central defender.

His father is handball player Sergei Demidov (1961–2020), who played internationally for the Soviet Union and later became a coach in Norway; the family moved to Sandefjord in 1989.

[2] Demidov turned professional in 2004 when he joined Sandefjord Fotball, and made his debut for the club in the First Division when he came on as a substitute for Magne Sturød after 87 minutes in the opening match of the 2004 season against Hødd.

[3] Demidov was then injured for a year[4] and after spending the second half of the 2005 campaign on loan at 2. divisjon side Fram Larvik,[5] he returned to Sandefjord who had won promotion to the Tippeligaen, with the team subsequently telling the player that the best thing for him would be to join another club.

[4] In Trondheim he became first-choice centre-back from the beginning playing alongside Kris Stadsgaard,[1] and was a part of the team that lost only one of 60 matches en route to winning two straight league championships, in 2009 and 2010.

[8] In July 2010, as his contract was approaching its end, Demidov signed a three-year deal with Spanish club Real Sociedad, effective as of January of the following year.

[27] Demidov played his second international in a friendly against Slovakia on 3 March 2010,[28] and featured heavily in the country's UEFA Euro 2012 qualifying campaign, in an eventual third-place finish in Group H.[citation needed] He is married to the Norwegian hurdler, Christina Vukicevic.