AIH or AiH may refer to:
Codes Air Incheon (ICAO airline designator AIH) Ai-Cham language, ISO 639-3 code
Medicine American Institute of Homeopathy (AIH), established in 1844, is the oldest extant national physician's organization in the US Autoimmune hepatitis, a human disease
Others American IronHorse, an American motorcycle manufacturer
As It Happens, a Canadian radio news program broadcast on CBC Radio One