Just finished
IOI 2025 took place in Bolivia. Visit the official website to learn more.
Just finished IOI 2025 in Bolivia
Members
Here is a list of the countries and regions which have participated in the last three International Olympiads in Informatics.
It is intended that each country or region have a website or e-mail (or both) for contact purposes.
Cuba
Web
Russia
No contacts
Applying for Membership
Organizations interested in representing a new country are encouraged to consult the current IOI Regulations and contact the Secretary of the IOI. New members must have the necessary resources, scientific expertise, authorization and ability to reach all potential contestants in the country. It is normally expected that a national level exam ("olympiad") that tests algorithmic knowledge and programming skill is already in place. However, if this is not the case, the IOI is happy to provide support and guidance leading towards a future membership application.
Former members
According to S2.1 of IOI Regulations: "For the IOI, a Country is a state that has an officially recognised relationship with the United Nations, UNESCO, or which has already taken part in one or more past IOIs".
