INH

INH or inh may refer to:


 * Ingush language, ISO 639 code
 * Inhambane Airport, Mozambique, IATA code INH
 * Isonicotinic acid hydrazide or isoniazid, an antibiotic for treatment of tuberculosis

Historic uses

 * Dutch East Indies, former FIFA country code INH
 * Instituto Nacional de Hidrocarburos (INH, National Hydrocarbons Institute, 1980–1995), Spanish state-owned petroleum management company