IHEYO is the umbrella network for humanist youth around the world. This includes teenagers and young adults upto 35 years of age. IHEYO is the youth section of IHEU, which is the international network for humanists, skeptics, rationalists, freethinkers, etc. around the world. IHEU brings together more than 100 organizations, giving them an international voice and platform.

IHEYO has had a long and interrupted history of existence, dating back to the sixties. Its current reactivation dates back to 2002. In 2012 IHEYO is celebrating its ten years anniversary!