The International Oak Society (IOS) is a nonprofit organization that brings together oak enthusiasts from around the world. Established in 1992, the society is dedicated to the preservation, study, and appreciation of oaks, specifically the genus Quercus. With a global network comprising scientists, academics, conservationists, horticulturists, and passionate amateurs, the IOS aims to connect individuals who share a love for these majestic trees and their vital roles in natural ecosystems and human landscapes.

Through various activities such as Triennial Conferences, Tours, Open Days, and workshops, the IOS provides a platform for members to connect, exchange information, and collaborate. As one of the leading botanical societies, the IOS is renowned for fostering knowledge exchange between scientific and non-scientific communities. The society's publications include the scientific journal International Oaks, the newsletter Oak News & Notes, and The Cupule, a free e-bulletin distributed to around 2,000 subscribers quarterly.

Members gain access to a Membership Directory, facilitating networking with oak enthusiasts worldwide. Additionally, the IOS maintains a comprehensive database of oak species and cultivars, and serves as the International Cultivar Registration Authority for the Quercus genus. Furthermore, the IOS actively supports the conservation of endangered oak species and habitats, as well as the preservation of historic oak trees.

These efforts, including research, advocacy, and restoration initiatives, are funded through the Oak Conservation and Research Fund. To learn more about the International Oak Society and to become a member, please contact membership@internationaloaksociety. org