IHH

IHH may refer to:


 * IHH Healthcare
 * IHH (protein), a protein which in humans is encoded by the IHH gene
 * IHH (Turkish NGO), an Islamic Turkish NGO active in more than 100 countries
 * I Heart Huckabees, a 2004 philosophical comedy film
 * Internationale Humanitäre Hilfsorganisation e.V., an international aid association based in Frankfurt
 * Isolated hypogonadotropic hypogonadism