IGH (or derivative) may refer to:
Idiopathic guttate hypomelanosis, a dermatological condition Igh (trigraph), used in Irish orthography Immunoglobulin heavy chain (IgH), the large polypeptide subunit of an antibody IGH@, the Immunoglobulin heavy locus, in biology Institut IGH, a Croatian company Internal geared hubs, used on bicycles Inver Grove Heights, Minnesota, U.S.