International Olympiad in Informatics

IOI 2026 - Uzbekistan

The latest Olympiad took place in Uzbekistan from August 9th to 16th. You can visit the event website, or scroll down to read about the IOI organization.

Website Results

News

IOI 2025 - Task Explanation Videos
The second task explanation of IOI tasks from last year has just been published on YouTube. This timeEljakim Schrijvers explains the task Festival...

IOI Journal - Volume 20
Dear IOI community, The OLYMPIADS IN INFORMATICS volume 20 has just been published.

EJOI 2026 - Call For Tasks
Dear all, The European Junior Olympiad in Informatics will take place 24-30 July 2026 in Kaunas, Lithuania.

Call for Papers
The 20th conference will be held concurrently with the 2026 International Olympiad in Informatics, which will take place in Uzbekistan.

Italian Olympiad - Open Contest 2025
For the tenth time, the Italian national contest (valid for the selection of the Italian IOI team) will be mirrored into an online contest. The...

Events

IOI 2026 was hosted by Uzbekistan
Uzbekistan hosted IOI 2026. Visit the official website of the event to learn more.

Germany was selected to host IOI 2027
Germany will host IOI 2027. You can read more on the official website of the event. Future event

IOI 2028 will take place in Japan
Japan has been selected to host IOI 2028. Check out the Editions page for more information. Future event

Bulgaria will host IOI 2029
IOI 2029 will take place in Bulgaria. You can find more information on the Editions page. Future event

IOI 2030 will be organized in Macau
Macau has been selected as the host of IOI 2030. Check out the Editions page for more information. Future event

Need more info?

Beginners

Not sure where to go? Click here to view some basic information on how to learn programming and prepare to win a medal at the IOI.

Statistics

A couple of volunteers maintain a separate page with stats about people who participated at the International Olympiad in Informatics.

Journal

The IOI publishes a journal every year, with original high-quality scientific papers related to education, contests and algorithms.

History of the IOI

Several International Olympiads in Informatics have been organized so far, hosted by a number of different countries.

IOI 1989, Bulgaria
IOI 1990, Soviet Union
IOI 1991, Greece
IOI 1992, Germany
IOI 1993, Argentina
IOI 1994, Sweden
IOI 1995, Netherlands
IOI 1996, Hungary
IOI 1997, South Africa
IOI 1998, Portugal
IOI 1999, Türkiye
IOI 2000, China
IOI 2001, Finland
IOI 2002, Korea
IOI 2003, USA
IOI 2004, Greece
IOI 2005, Poland
IOI 2006, Mexico
IOI 2007, Croatia
IOI 2008, Egypt
IOI 2009, Bulgaria
IOI 2010, Canada
IOI 2011, Thailand
IOI 2012, Italy
IOI 2013, Australia
IOI 2014, Taiwan
IOI 2015, Kazakhstan
IOI 2016, Russia
IOI 2017, Iran
IOI 2018, Japan
IOI 2019, Azerbaijan
IOI 2020, Singapore*
IOI 2021, Singapore*
IOI 2022, Indonesia
IOI 2023, Hungary
IOI 2024, Egypt
IOI 2025, Bolivia
IOI 2026, Uzbekistan

Organization

The International Olympiad in Informatics is organized according to the IOI Regulations, and the decision made by the General Assembly.
On this site, you can find all regulations, minutes, and people involved with the organization.

OrganizationInfo Members

About

The IOI is one of five international science olympiads. The primary goal of the IOI is to stimulate interest in informatics (computing science) and information technology.

Another important goal is to bring together exceptionally talented pupils from various countries and to have them share scientific and cultural experiences.