George Christos Timotheou (born 29 July 1997) is an Australian football player who plays as a centre-back for Gungahlin United. He last played professionally for Melbourne Victory.
Timotheou started his professional career at Sydney FC, but never managed to break into the first team, instead playing in their reserve squad in the NPL. However halfway through his two-year contract, he left the club to sign for Sydney Olympic FC, where he made 27 appearances, during his 2 seasons there, before leaving to sign a deal with Bundesliga club Schalke 04. Timotheou made his professional debut for Schalke 04 in the Bundesliga on 18 May 2019, starting in the home match against VfB Stuttgart. In November 2020, Timotheou returned to the A-League, signing with Adelaide United on a two-year deal.