BUT or But may refer to:
- "But", a common English conjunction
- British United Traction, a division of Leyland Motors Ltd
- Brno University of Technology, a university located in Brno, Czech Republic
- Bathpalathang Airport, a domestic airport in Bhutan
- "BUT"/"Aishō", a 2007 J-Pop single by Koda Kumi
- But, Opole Voivodeship, a village in Poland
- Vladimir But, Russian footballer
- Jenson Button, British Formula One driver
- For the organic chemical name component, see but-
- BUT (retailer), a French retail store franchise brand