The Institute for Advanced Study of Human Sexuality (IASHS) was an unaccredited, for-profit, degree-granting institution and resource center in the field of sexology in San Francisco, California. It was established in 1976 and closed in 2018. Degree and certificate programs focused on public health, sex therapy, and sexological research.

The institute grew out of research in the 1960s highlighting the general lack of understanding of and formal training in human sexuality. Its library and archives were a collection of adult films, academic sexological and erotological resources, and sex therapy training materials.

Like all post-secondary schools in California, IASHS was required by California law to register with the State of California Bureau for Private Postsecondary Education, an anti-fraud or anti-diploma mill unit of the California Department of Consumer Affairs. IASHS had BPPE "approval to operate", which means that IASHS met the minimum legal standards for "offering of bona fide instruction by qualified faculty". That approval was discontinued in 2014. In 2017, the institute's attempt to renew operation was denied.