CRH may refer to:Calibre radius head, a traditional British ordnance term for a concept in ballistic projectile design Celtic Resources Holdings, an Irish mining company China Railway High-speed, a high-speed railway service operated by China Railway Choate Rosemary Hall, a private boarding school in Wallingford, Connecticut Coin roll hunting, the hobby of searching change pulled from circulation for collectible coins Combat Rescue Helicopter (HH-60W), being developed for the US Air Force based on the Sikorsky UH-60 Black Hawk Corticotropin-releasing hormone, a polypeptide hormone and neurotransmitter involved in the stress response Council on Religion and the Homosexual, an American LGBT rights organization CRH plc, a building materials company, based in Ireland Crimean Tatar language's ISO 639-2 and 639-3 code Crouch Hill railway station, a railway station in England Critical relative humidity, a property of water-soluble substances