Buc may refer to:
- Buc, Yvelines, a commune of the Yvelines département, in France
- Buc, Territoire de Belfort, a commune of the Territoire de Belfort département, in France
- Búč, a village in south Slovakia
- buc, the ISO 639-3 code for the Bushi language
- A nickname for Bucciali, a French automobile
- BUC, a Catalonia rugby league team
The abbreviation BUC can refer to:
- Bulgarian Air Charter, a charter airline based in Sofia, Bulgaria
- Block upconverter, a device used in the transmission of satellite signals
- Bergen University College, a higher education institute in Bergen, Norway
- Bucharest, in Romanian conversations on mIRC,chat or messenger
- Bàng-uâ-cê, the Foochow Romanized writing system of Fuzhou Mindong Chinese.
- Beirut University College, old name for the Lebanese American University
- Business Use Case, a use case in software and systems engineering
- The space of bounded uniformly continuous functions, a class of mathematical objects
- Business Unit Control
- British Unicycle Convention - an annual get together of British unicyclists