- DUK stands for Duke Energy Corporation (stock symbol)
- DUK stands for Dunkirk (Amtrak station code; Dunkirk, NY)
- DUK stands for Demokratyczna Unia Kobiet (Polish: Democratic Women’s Union; Gdansk, Poland)
- DUK stands for Dead Upon Keyboard
- DUK stands for Deutsch Und Kommunikation (German: German and Communications; handbook)
- DUK stands for Deutschen UNESCO (United Nations Educational, Scientific and Cultural Organization) Kommission (German: German UNESCO Commission)
- DUK stands for Diocese of the United Kingdom
DUK