BCH and BCh may refer to:
- BCH code, in coding theory, a code by Bose, Chaudhuri, and Hocquenghem
- Bachelor of Surgery, a component of an undergraduate medical degree in some countries
- Baker-Campbell-Hausdorff formula, in mathematics and Lie group theory
- Barclays Cycle Hire, public bicycle sharing scheme in London, UK
- Biosafety Clearing-House, an international mechanism that exchanges information about the movement of genetically modified organisms
- Birchington-on-Sea station, a railway station in the UK
- Birmingham Children's Hospital, a hospital in Birmingham, England
- British Columbia Hydro and Power Authority (railway reporting mark)
- Bataliony Chłopskie, a Polish resistance movement in World War II
- Belfast City Hospital, a hospital in Belfast, Northern Ireland
- BCCH, Broadcast Control Channel, A control channel in GSM Um Radio Interface
- Stands for Biochemistry or Biology and Chemistry in many universities
- Bulletin de correspondance hellénique (Paris) on Greek epigraphy.