HIH

HIH may refer to:


 * His or Her Imperial Highness, a title used for members of an imperial family
 * HIH Insurance, a former Australian insurance company
 * Harstad University College (Norwegian: Høgskolen i Harstad, HiH)
 * Heart in Hand (band), an English band
 * Pamosu language's ISO code
 * "Harleys in Hawaii", a song by Katy Perry, 2019