AIHA or Aiha may refer to:
Agudas Israel Housing Association Albany Institute of History & Art AIHA Singapore, Singapore Ice Hockey Association American Industrial Hygiene Association Austrian Ice Hockey Association Autoimmune haemolytic anaemia Aaiha (or Aiha), village, plain, lake, and temporary wetland in Lebanon Aiha script, the writing system of the fictional Kesh language in the novel Always Coming Home by Ursula K. Le Guin