WGN

WGN may refer to:


 * "World's Greatest Newspaper", former slogan of the Chicago Tribune and the namesake for the WGN broadcasting outlets in Chicago, Illinois.
 * WGN (AM), a radio station (720 AM) licensed to Chicago, Illinois, United States
 * WGN-TV, a television station (channel 9.1 virtual/19 digital) licensed to Chicago, Illinois, United States
 * WGN America, the former name of NewsNation, a cable television network based in Chicago, Illinois, United States
 * WFMT, a radio station (98.7 FM) licensed to Chicago, Illinois, United States, which operates on the frequency formerly belonging to the Tribune-owned FM station that used the call sign WGNB from 1945 until 1953
 * Shaoyang Wugang Airport, IATA code WGN
 * White Gaussian noise
 * Additive white Gaussian noise
 * The ICAO airline designator for Western Global Airlines
 * WGN, Journal of the International Meteor Organization
 * WorldGaming Network