WCG may refer to:

  • World Choir Games
  • World Cyber Games, an international e-sports event also known as "Cyber Games Festival"
  • Wide Color Gamut, a certain complete subset of colors
  • World Community Grid, a public computing grid for scientific research projects
  • Worldwide Church of God
  • WCG is an agency specializing in creative, interactive, and marketing communications services for consumer product, entertainment, healthcare, and technology clients.