CRH can refer to:
- Choate Rosemary Hall, a private boarding school in Wallingford, Connecticut
- Crimean Tatar language, ISO 639-2 code for Crimean Tatar language
- Celtic Resources Holdings plc, an Irish mining company
- CRH plc, an Irish company that produces building materials
- China Railway High-speed, the high-speed rail system operated by China Railways
- Corticotropin-releasing hormone, a polypeptide hormone and neurotransmitter involved in the stress response
- Cri Helicopters Mexico (ICAO airline designator: CRH)
- Crouch Hill railway station, a railway station in England (National Rail station code: CRH)
- Coin roll hunting, the hobby of searching change pulled from circulation for collectible coins
- Calderdale Royal Hospital
- Calibre radius head, an engineering term that describing a military shell