DET

DET or Det may refer to:

• Department of Education (New South Wales), formerly Department of Education and Training
• Duolingo English Test (DET), a standardized language test

• Detection error tradeoff
• det, mathematical notation for the determinant of a matrix

• Detroit, Michigan, United States
• Detroit (Amtrak station)
• Coleman A. Young International Airport, Detroit (IATA:DET)

• Sports in Detroit, US
  • Detroit Lions, National Football League
  • Detroit Pistons, National Basketball Association
  • Detroit Tigers, Major League Baseball
  • Detroit Red Wings, National Hockey League

• Dafydd Elis-Thomas (1946-2025), Welsh politician
• Determiner, in interlinear glossing
• Diethyltryptamine, a psychedelic drug
• It (poetry collection), 1969, by Inger Christensen (Danish: Det)
• 14 Intelligence Company "The Det", a British undercover military unit