JH may refer to: Science and technology JH (hash function), in cryptography Juvenile hormone, in insects
Transport Japan Highway Public Corporation Fuji Dream Airlines (since 2008, IATA code JH), a Japanese airline Harlequin Air (1997-2005, IATA code JH), a former Japanese airline Nordeste Linhas Aéreas Regionais (1976-1995, IATA code JH), a former Brazilian airline , symbol for Yokohama Line railway service
Other uses Jh (digraph), in written language Jharkhand, India (ISO 3166: JH) Jim Henson (1936-1990), American puppeteer best known for creating the Muppets Jorden Hall, a building on the campus of the University of Sioux Falls, South Dakota