JT may refer to:
The Joint Test Action Group (JTAG) is an electronics industry association formed in 1985 for developing a method of verifying designs and testing printed circuit boards after manufacture.
Multijet is Fiat Chrysler Automobiles' term for its current common rail direct injection turbodiesel engine range.
Jayson Anthony Paul (born December 10, 1984), better known by the ring name JTG, is an American professional wrestler and author who is best known for his time in WWE.
Jeremiah "Terminator" LeRoy is a literary persona created by American writer Laura Albert. After the first novel Sarah was published, Laura Albert started hiring her sister-in-law Savannah Knoop to make public appearances as JT LeRoy.
JT Group Limited (doing business as JT) is the parent company of several subsidiaries including Jersey Telecom Limited and Wave Telecom Limited.
John Thomas "JT" McNamara (8 April 1975 – 26 July 2016) was an Irish amateur steeplechase jockey. He won over 600 racecourse victories during his career.
JTBC (Hangul: 제이티비씨) is a South Korean nationwide general cable TV network and broadcasting company, in which the largest shareholder is JoongAng Ilbo/JoongAng Media Network with 25% of shares.
Jonathan "Johnny" Davis (born December 5, 1989) is an American professional wrestler, better known by his ring name JT Dunn.
JTR is a Swedish boy band made up of three brothers John Andreasson (born 1990), Tom Lundbäck (born 1993) and Robin Lundbäck (born 1994).