YT

YT, Yt or yt may refer to:

Media

 * YouTube, an American online video platform

People

 * Jia Yueting (English nickname "YT", born 1973), Chinese entrepreneur
 * Y.T., a character in the novel Snow Crash by Neal Stephenson

Places

 * YT, the ISO 3166-1 alpha-2 code for Mayotte
 * .yt, the Internet top-level domain for Mayotte
 * Yukon (formerly Yukon Territory) in Canada

Science and technology

 * Yt antigen system, a human blood group system
 * Yottatesla, an SI unit of magnetic flux density
 * Yttrium, a chemical element with the former symbol Yt

Transportation

 * Air Togo, IATA airline designator YT
 * Yard tug (YT), one of the US Navy hull classification symbols