DUI or driving under the influence is the act of driving a motor vehicle with blood levels of alcohol in excess of a legal limit.
DUI may also refer to:
- Democratic Union for Integration, a political party in Macedonia
- Diving Unlimited International, an American diving equipment designer and manufacturer
- Duke University Improv
- Distinctive unit insignia, a metal heraldic device worn by soldiers in the U.S. Army
- Dui (vessel), a type of bronze vessel from ancient China
- "D.U.I.", a song by the Offspring from "Gone Away"
- "D.U.I.", a song by Green Day from Nimrod