YK

YK or yk may refer to:

Places

 * Yellowknife, Northwest Territories, the capital of the Northwest Territories of Canada
 * Yogyakarta, a city in Indonesia
 * Yogyakarta railway station, a railway station in Yogyakarta (station code YK)
 * Yukon, a territory in Canada (with any casing, within internet TLD .CA, and as YK for an unofficial postal abbreviation)

In business

 * IATA airline codes:
 * YK, former code for Cyprus Turkish Airlines (defunct since June 2010)
 * Avia Traffic Company of Kyrgyzstan (starting between June 2010 and end of 2015)
 * Yugen kaisha, a form of business organization in Japan

Other uses

 * Yom Kippur, a Jewish Day of Atonement
 * Yottakelvin, a measure of temperature equal to 1 septillion kelvin, or 1000000000000000000000000K