IHSS

IHSS may refer to:


 * Honduran Social Security Institute (Instituto Hondureño de Seguridad Social in Spanish), social security in Honduras
 * Idiopathic hypertrophic subaortic stenosis, an older term for hypertrophic obstructive cardiomyopathy (HOCM)
 * International Humic Substances Society, a scientific society that seeks to advance knowledge and research of natural organic matter