WLK is an abbreviation for World of Warcraft: Wrath of the Lich King, the second expansion set for World of Warcraft.
WLK or Wlk may also refer to: wlk, the ISO 639-3 code for Wailaki language Selawik Airport, the IATA code WLK Windows Logo Kit, a software framework Allan Wlk, a Paraguayan footballer Westlake Corporation, the NYSE code WLK We Love Katamari, a 2005 videogame WLK (AM), radio station located in Indianapolis, Indiana from 1922 until 1923