Viki may refer to:
- Viki, a signature guitar used by guitarist Jan Carlo DeFan
- List of recurring characters in Suikoden#Viki, a Suikoden character
- Viki (operetta), an operetta by Paul Abraham (composer)
- Viki, Estonia, a village Saare County in Estonia
- V.I.K.I. (Virtual Interactive Kinetic Intelligence), a character from the film I, Robot
- Viki (website), a video streaming company