DT may refer to:

• "D.T.", an instrumental song on Who Made Who, AC/DC's 1986 album
• Dark Tranquillity, Swedish melodic death metal band
• Dream Theater, American progressive metal band
• MC DT, a UK garage emcee and member of DJ Pied Piper and the Masters of Ceremonies

• The Dark Tower (disambiguation), various works of fiction
• Dilithium (Star Trek), fictional chemical element by its symbol
• Ixion Saga DT, a television series
• An abbreviation for documentary theatre

• Daimler Truck, German commercial vehicle manufacturer
• Dalarnas Tidningar, Swedish newspaper and media company
• Deutsche Telekom (by NYSE ticker symbol)
• Dhanmondi Tutorial, an educational organisation
• Dimosia Tileorasi, a former Greek public broadcaster
• DT Infrastructure, Australian construction company
• Dynatrace, software intelligence provider (by NYSE stock symbol)
• TAAG Angola Airlines (IATA code: DT)
• Turkish State Theatres (Turkish: Devlet Tiyattolari)

• d/t, shorthand for "due to"
• Discourse transcription, in linguistics
• Daighi tongiong pingim, an orthography in the Latin alphabet for Taiwanese language

• Nickname for Demaryius Thomas (1987–2021), American football player
• Nickname for Derrick Thomas (1967–2000), American football player
• Nickname for Donald Trump (born 1946), American businessman and president of the United States
• Nickname for Israel Del Toro (born 1975), American motivational speaker and former Air Force sergeant

• District, in abbreviations
• Downtown, in abbreviations
• Dakota Territory, the northernmost part of the land acquired in the Louisiana Purchase
• DT postcode area, including Dorchester and surrounding areas in southern England

• <dt></dt>, an HTML element for specifying definition data
• Daemon Tools, a disk image emulator
• Digital television, the transmission of television signals using digital encoding
• Digital transformation, the adoption of digital technology
• Decision tree, a decision support tool

• DT vaccine, a diphtheria and tetanus vaccine
• Dark triad, a group of personality traits
• Delirium tremens, a medical condition of uncontrolled shaking, typically due to alcohol or drug withdrawal
• Drug Tariff price, the amount pharmacies in the United Kingdom get reimbursed for generic medications
• Digestive tract, the tract or passageway of the digestive system that leads from the mouth to the anus

• Douglas DT, a U.S. Navy torpedo bomber
• DT, variant of the Degtyaryov machine gun for mounting and loading in armoured fighting vehicles

• DT, in nuclear fusion, the ratio of hydrogen isotopes deuterium and tritium
  • Deuterium–tritium fusion, a type of nuclear fusion
• Navistar DT engine
• ΔT (timekeeping), the time difference between Universal Time (UT, defined by Earth's rotation) and Terrestrial Time (TT, independent of Earth's rotation)

• DT, latinised symbol for the Tunisian dinar
• Defensive tackle, a position in American football
• Design and technology, an area of study taught at schools and colleges
• Deuteronomy, the fifth book of the Hebrew Bible
• "Discus throw" athletics abbreviation in track and field

• Delirium Tremens (disambiguation)