BUP may refer to:
- .bup, a type of backup information file used in DVD video
- bup, backup software that uses Git packfiles for storage
- Bononia University Press, an Italian University Press and art book publisher
- Baltic University Programme, a network of about 225 universities and other institutes of higher education in the Baltic Sea region
- Bangladesh University of Professionals, a public university of Bangladesh
- Banque de l'Union Parisienne, a French investment bank
- Bucknell University Press, a publisher of books about the humanities and social and biological sciences
- British Unionist Party, a Scottish political party